diff --git a/.devcontainer/README.md b/.devcontainer/README.md
new file mode 100644
index 00000000000..47d7e038d2e
--- /dev/null
+++ b/.devcontainer/README.md
@@ -0,0 +1,31 @@
+# To start developing:
+
+Wait for the container to build and start. You will see "Done. Press any key to close the terminal." in the terminal when it's ready. 
+
+Once it's running, you can start the development server:
+
+**Option 1:** Press `Ctrl+Shift+P`, type "Run Task", select "Start Development"
+**Option 2:** Open a terminal and run:
+
+```bash
+pnpm run develop
+```
+
+## Optional setup
+
+For E2E tests:
+
+```bash
+npx playwright install chromium
+```
+
+For curriculum tests:
+
+```bash
+pnpm -F=curriculum install-puppeteer
+```
+
+## More information
+
+For detailed setup instructions and contribution guidelines, visit:
+https://contribute.freecodecamp.org/how-to-setup-freecodecamp-locally
diff --git a/.devcontainer/devcontainer.json b/.devcontainer/devcontainer.json
index 4533b9f1567..f373492c453 100644
--- a/.devcontainer/devcontainer.json
+++ b/.devcontainer/devcontainer.json
@@ -1,8 +1,11 @@
 {
-  "name": "freeCodeCampDC",
+  "name": "freeCodeCamp",
   "dockerComposeFile": "docker-compose.yml",
   "service": "devcontainer",
-  "workspaceFolder": "/workspaces/${localWorkspaceFolderBasename}",
+  "workspaceFolder": "/workspaces/freeCodeCamp",
+  "mounts": [
+    "source=fcc-node-modules,target=${containerWorkspaceFolder}/node_modules,type=volume"
+  ],
   "forwardPorts": [3000, 8000],
   "portsAttributes": {
     "3000": {
@@ -17,9 +20,64 @@
   "otherPortsAttributes": {
     "onAutoForward": "silent"
   },
-  "onCreateCommand": "[ ! -f .env ] && cp sample.env .env || true",
-  "updateContentCommand": "pnpm install && pnpm seed",
-  "postAttachCommand": {
-    "instructions": "bash -c 'echo \"\n\n\n Start a new terminal and run \\`pnpm run develop\\` when you are ready.\n\n\n\"'"
+  "onCreateCommand": "sudo chown node:node node_modules && ([ ! -f .env ] && cp sample.env .env || true)",
+  "updateContentCommand": "pnpm install --prefer-offline",
+  "postCreateCommand": "rsync -a --include='*/' --include='.turbo/***' --exclude='*' /home/node/.cache/fcc/ ./ && set -a && . ./.env && set +a && until mongosh --eval 'rs.status().ok' 2>/dev/null; do sleep 1; done && pnpm seed",
+  "customizations": {
+    "vscode": {
+      "extensions": [
+        "dbaeumer.vscode-eslint",
+        "esbenp.prettier-vscode"
+      ],
+      "settings": {
+        "task.allowAutomaticTasks": "on",
+        "tasks": {
+          "version": "2.0.0",
+          "tasks": [
+            {
+              "label": "Start API Server",
+              "type": "shell",
+              "command": "pnpm run develop:api",
+              "isBackground": true,
+              "problemMatcher": [],
+              "presentation": {
+                "reveal": "always",
+                "panel": "dedicated",
+                "group": "develop"
+              }
+            },
+            {
+              "label": "Start Client Server",
+              "type": "shell",
+              "command": "pnpm run develop:client",
+              "isBackground": true,
+              "problemMatcher": [],
+              "presentation": {
+                "reveal": "always",
+                "panel": "dedicated",
+                "group": "develop"
+              }
+            },
+            {
+              "label": "Start Development",
+              "dependsOn": ["Start API Server", "Start Client Server"],
+              "problemMatcher": []
+            },
+            {
+              "label": "Open README",
+              "type": "shell",
+              "command": "code .devcontainer/README.md",
+              "presentation": {
+                "reveal": "silent",
+                "close": true
+              },
+              "runOptions": {
+                "runOn": "folderOpen"
+              }
+            }
+          ]
+        }
+      }
+    }
   }
 }
diff --git a/.devcontainer/docker-compose.yml b/.devcontainer/docker-compose.yml
index 6b772f45e36..a2d83835a8b 100644
--- a/.devcontainer/docker-compose.yml
+++ b/.devcontainer/docker-compose.yml
@@ -1,17 +1,16 @@
 services:
   devcontainer:
+    image: ghcr.io/freecodecamp/devcontainer:latest
     depends_on:
       - db
       - setup
-    image: mcr.microsoft.com/devcontainers/typescript-node:22
     volumes:
-      - ../..:/workspaces:cached
+      - ..:/workspaces/freeCodeCamp:cached
     network_mode: service:db
     command: sleep infinity
 
   db:
     image: mongo:8.0
-    container_name: mongodb
     command: mongod --replSet rs0
     restart: unless-stopped
     hostname: mongodb
@@ -21,27 +20,20 @@ services:
       test: ['CMD', 'mongosh', '--eval', "db.adminCommand('ping')"]
       interval: 2s
       retries: 5
+      start_period: 10s
 
   setup:
     image: mongo:8.0
     depends_on:
       db:
         condition: service_healthy
-    restart: on-failure
-    # This will try to initiate the replica set, until it succeeds twice (i.e. until the replica set is already initialized)
+    restart: on-failure:5
     command: >
       mongosh --host mongodb:27017 --eval '
-        var cfg = {
+        rs.initiate({
           _id: "rs0",
-          members: [
-            { _id: 0, host: "mongodb:27017" }
-          ]
-        };
-        try {
-          rs.initiate(cfg);
-        } catch (err) {
-          if(err.codeName !== "AlreadyInitialized") throw err;
-        }
+          members: [{ _id: 0, host: "mongodb:27017" }]
+        }).ok || rs.status().ok
       '
 
 volumes:
diff --git a/.github/workflows/devcontainer-ci.yml b/.github/workflows/devcontainer-ci.yml
new file mode 100644
index 00000000000..94144364fb3
--- /dev/null
+++ b/.github/workflows/devcontainer-ci.yml
@@ -0,0 +1,63 @@
+name: CI - Devcontainer
+
+on:
+  pull_request:
+    paths:
+      - '.devcontainer/**'
+      - 'docker/devcontainer/**'
+  workflow_dispatch:
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
+permissions:
+  contents: read
+  packages: read
+
+jobs:
+  validate:
+    name: Validate
+    runs-on: ubuntu-24.04
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
+
+      - name: Login to GHCR
+        uses: docker/login-action@c94ce9fb468520275223c153574b00df6fe4bcc9 # v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Install devcontainer CLI
+        # renovate: datasource=npm depName=@devcontainers/cli
+        run: npm install -g @devcontainers/cli@0.83.0
+
+      - name: Build devcontainer
+        run: devcontainer build --workspace-folder .
+
+      - name: Start devcontainer
+        run: devcontainer up --workspace-folder .
+
+      - name: Validate required tools
+        run: |
+          devcontainer exec --workspace-folder . pnpm --version
+          devcontainer exec --workspace-folder . rsync --version
+          devcontainer exec --workspace-folder . mongosh --version
+          devcontainer exec --workspace-folder . node --version
+          devcontainer exec --workspace-folder . git --version
+
+      - name: Validate MongoDB replica set
+        run: |
+          for i in $(seq 1 30); do
+            if devcontainer exec --workspace-folder . mongosh --eval "rs.status().ok" 2>/dev/null; then
+              echo "Replica set is ready"
+              exit 0
+            fi
+            echo "Waiting for replica set... (attempt $i/30)"
+            sleep 2
+          done
+          echo "Replica set failed to initialize"
+          exit 1
diff --git a/.github/workflows/docker-ghcr.yml b/.github/workflows/docker-ghcr.yml
index 9005cb39915..09f03a4b668 100644
--- a/.github/workflows/docker-ghcr.yml
+++ b/.github/workflows/docker-ghcr.yml
@@ -1,4 +1,4 @@
-name: CD - Docker - GHCR (Gitpod)
+name: CD - Docker - GHCR Images
 
 on:
   workflow_dispatch:
@@ -6,55 +6,44 @@ on:
     branches:
       - main
     paths:
-      - 'docker/gitpod/*'
+      - 'pnpm-lock.yaml'
+      - 'docker/devcontainer/**'
+      - '.github/workflows/docker-ghcr.yml'
+
+permissions:
+  contents: read
+  packages: write
 
 jobs:
-  build-and-push-image:
+  build-and-push:
+    name: Build and Push Images
     runs-on: ubuntu-24.04
-    permissions:
-      contents: read
-      packages: write
-
-    strategy:
-      fail-fast: false
-      matrix:
-        images:
-          - gitpod
 
     steps:
-      - name: Checkout code
+      - name: Checkout
         uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
+        with:
+          submodules: 'recursive'
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@c7c53464625b32c7a7e944ae62b3e17d2b600130 # v3
 
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@8d2750c68a42422c14e847fe6c8ac0403b4cbd6f # v3
 
-      - name: Log in to the GHCR
+      - name: Log in to GHCR
         uses: docker/login-action@c94ce9fb468520275223c153574b00df6fe4bcc9 # v3
         with:
           registry: ghcr.io
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
 
-      - name: Cache Docker layers
-        uses: actions/cache@cdf6c1fa76f9f475f3d7449005a359c84ca0f306 # v5.0.3
+      - name: Build and push images
+        uses: docker/bake-action@5be5f02ff8819ecd3092ea6b2e6261c31774f2b4 # v6
         with:
-          path: /tmp/.buildx-cache
-          key: ${{ runner.os }}-buildx-${{ matrix.images }}-${{ github.sha }}
-          restore-keys: |
-            ${{ runner.os }}-buildx-${{ matrix.images }}-
-
-      - name: Build and push Docker image
-        uses: docker/build-push-action@263435318d21b8e681c14492fe198d362a7d2c83 # v6.18.0
-        with:
-          context: ./docker/${{ matrix.images }}
+          files: docker/devcontainer/docker-bake.hcl
+          targets: devcontainer
           push: true
-          tags: |
-            ghcr.io/freecodecamp/${{ matrix.images }}:${{ github.sha }}
-            ghcr.io/freecodecamp/${{ matrix.images }}:latest
-          cache-from: type=local,src=/tmp/.buildx-cache
-          cache-to: type=local,dest=/tmp/.buildx-cache-new,mode=max
-
-      - name: Move cache
-        run: |
-          rm -rf /tmp/.buildx-cache
-          mv /tmp/.buildx-cache-new /tmp/.buildx-cache
+        env:
+          TAG: ${{ github.sha }}
+          TAG_LATEST: ${{ github.ref_name == 'main' }}
diff --git a/.gitpod.yml b/.gitpod.yml
deleted file mode 100644
index bf61e9b5259..00000000000
--- a/.gitpod.yml
+++ /dev/null
@@ -1,78 +0,0 @@
-image: ghcr.io/freecodecamp/gitpod:latest
-ports:
-  - port: 27017 # mongodb
-    onOpen: ignore
-  - port: 8000 # client
-    onOpen: notify
-    visibility: public
-  - port: 9228 # node debug
-    onOpen: ignore
-  - port: 3000 # api
-    onOpen: ignore
-    visibility: public
-  - port: 9229 # node debug
-    onOpen: ignore
-  - port: 9230 # client node debug
-    onOpen: ignore
-  - port: 3200 # challenge editor api
-    visibility: public
-  - port: 3300 # challenge editor client
-    visibility: public
-  - port: 8025 # Mailpit
-    visibility: public
-    onOpen: ignore
-  - port: 1025 # Mailpit
-    onOpen: ignore
-  - port: 9323 # Playwright
-    visibility: public
-    onOpen: ignore
-
-tasks:
-  - before: |
-      echo '
-      export COOKIE_DOMAIN=.gitpod.io
-      export HOME_LOCATION=$(gp url 8000)
-      export API_LOCATION=$(gp url 3000)
-      export CHALLENGE_EDITOR_API_LOCATION=$(gp url 3200)
-      export CHALLENGE_EDITOR_CLIENT_LOCATION=$(gp url 3300)
-      export CHALLENGE_EDITOR_LEARN_CLIENT_LOCATION=$(gp url 8000)
-      ' >> ~/.bashrc;
-      exit;
-
-  - name: db
-    # starting mongod in background, so it doesn't block prebuilds
-    before: >
-      docker compose -f docker/docker-compose.yml up -d
-
-  - name: server
-    before: export COOKIE_DOMAIN=.gitpod.io && export HOME_LOCATION=$(gp url 8000) && export API_LOCATION=$(gp url 3000)
-    # init is not executed for prebuilt workspaces and restarts,
-    # so we should put all the heavy initialization here
-    init: >
-      cp sample.env .env &&
-      pnpm install &&
-      gp sync-done pnpm-install &&
-      pnpm run build:curriculum &&
-      gp ports await 27017
-    command: >
-      pnpm run seed &&
-      mongosh --eval "db.fsyncLock(); db.fsyncUnlock()" &&
-      gp ports await 27017 &&
-      cd api &&
-      pnpm run develop
-
-  - name: client
-    before: export HOME_LOCATION=$(gp url 8000) && export API_LOCATION=$(gp url 3000)
-    init: >
-      cd ./client &&
-      gp sync-await pnpm-install &&
-      cd ..
-    command: >
-      gp ports await 3000 &&
-      pnpm run develop:client -- -H '0.0.0.0'
-    openMode: split-right
-
-vscode:
-  extensions:
-    - dbaeumer.vscode-eslint
-    - esbenp.prettier-vscode
diff --git a/curriculum/i18n-curriculum b/curriculum/i18n-curriculum
index 5e4b2ee159f..1bb234bbc44 160000
--- a/curriculum/i18n-curriculum
+++ b/curriculum/i18n-curriculum
@@ -1 +1 @@
-Subproject commit 5e4b2ee159fe404f182184147af996b241dc5c9f
+Subproject commit 1bb234bbc445e5a59f7f0d706130fe25612197cd
diff --git a/docker/devcontainer/Dockerfile b/docker/devcontainer/Dockerfile
new file mode 100644
index 00000000000..19513316966
--- /dev/null
+++ b/docker/devcontainer/Dockerfile
@@ -0,0 +1,97 @@
+# =============================================================================
+# BASE - System dependencies, pnpm, mongosh
+# =============================================================================
+FROM node:24-bookworm AS base
+
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    git \
+    curl \
+    jq \
+    gnupg \
+    sudo \
+    rsync \
+    && rm -rf /var/lib/apt/lists/* \
+    && echo "node ALL=(ALL) NOPASSWD:ALL" >> /etc/sudoers.d/node
+
+RUN curl -fsSL https://www.mongodb.org/static/pgp/server-8.0.asc | gpg --dearmor -o /usr/share/keyrings/mongodb-archive-keyring.gpg \
+    && echo "deb [signed-by=/usr/share/keyrings/mongodb-archive-keyring.gpg] https://repo.mongodb.org/apt/debian bookworm/mongodb-org/8.0 main" > /etc/apt/sources.list.d/mongodb-org-8.0.list \
+    && apt-get update \
+    && apt-get install -y --no-install-recommends mongodb-mongosh \
+    && rm -rf /var/lib/apt/lists/*
+
+# renovate: datasource=npm depName=pnpm
+RUN npm install -g pnpm@10.28.1
+
+ENV PLAYWRIGHT_BROWSERS_PATH=/home/node/.cache/ms-playwright
+ENV npm_config_store_dir=/home/node/.local/share/pnpm/store
+
+# =============================================================================
+# BUILDER - Install dependencies and build to populate caches (disposable)
+# =============================================================================
+FROM base AS builder
+
+USER node
+WORKDIR /home/node/.cache/fcc
+
+# Package manifests only (for pnpm install caching)
+COPY --chown=node:node pnpm-lock.yaml pnpm-workspace.yaml package.json turbo.json tsconfig-base.json ./
+COPY --chown=node:node api/package.json api/
+COPY --chown=node:node client/package.json client/turbo.json client/
+COPY --chown=node:node curriculum/package.json curriculum/turbo.json curriculum/
+COPY --chown=node:node e2e/package.json e2e/
+
+COPY --chown=node:node tools/challenge-helper-scripts/package.json tools/challenge-helper-scripts/
+COPY --chown=node:node tools/challenge-parser/package.json tools/challenge-parser/
+COPY --chown=node:node tools/client-plugins/browser-scripts/package.json tools/client-plugins/browser-scripts/
+COPY --chown=node:node tools/client-plugins/gatsby-remark-node-identity/package.json tools/client-plugins/gatsby-remark-node-identity/
+COPY --chown=node:node tools/client-plugins/gatsby-source-challenges/package.json tools/client-plugins/gatsby-source-challenges/
+COPY --chown=node:node tools/daily-challenges/package.json tools/daily-challenges/
+COPY --chown=node:node tools/scripts/seed/package.json tools/scripts/seed/
+COPY --chown=node:node tools/scripts/seed-exams/package.json tools/scripts/seed-exams/
+
+COPY --chown=node:node packages/challenge-builder/package.json packages/challenge-builder/
+COPY --chown=node:node packages/challenge-linter/package.json packages/challenge-linter/
+COPY --chown=node:node packages/eslint-config/package.json packages/eslint-config/
+COPY --chown=node:node packages/shared/package.json packages/shared/
+
+# Prisma schema needed for api postinstall script (prisma generate)
+COPY --chown=node:node api/prisma/ api/prisma/
+COPY --chown=node:node api/prisma.config.ts api/
+
+# Install dependencies (populates pnpm store)
+ENV PUPPETEER_SKIP_DOWNLOAD=true
+RUN pnpm install --frozen-lockfile
+
+# Source files for builds
+COPY --chown=node:node packages/ packages/
+COPY --chown=node:node tools/ tools/
+COPY --chown=node:node curriculum/ curriculum/
+
+# Build shared packages and curriculum (populates Turbo cache)
+# Source .env so turbo hashes env vars (e.g. FCC_*) identically to runtime
+COPY --chown=node:node sample.env .env
+RUN set -a && . ./.env && set +a && \
+    pnpm turbo build --filter=@freecodecamp/shared && \
+    pnpm turbo build --filter=@freecodecamp/curriculum
+
+# =============================================================================
+# DEVCONTAINER - Clean image with only pre-populated caches
+# Used by: GitHub Codespaces, local VS Code devcontainers
+# =============================================================================
+FROM base AS devcontainer
+
+LABEL org.opencontainers.image.source=https://github.com/freeCodeCamp/freeCodeCamp \
+      org.opencontainers.image.description="Development container for freeCodeCamp with pre-populated caches" \
+      org.opencontainers.image.licenses=BSD-3-Clause
+
+USER node
+
+# Copy pre-populated pnpm store (for fast pnpm install --prefer-offline)
+COPY --from=builder --chown=node:node /home/node/.local/share/pnpm/store /home/node/.local/share/pnpm/store
+
+# Copy turbo cache only (preserving directory structure for rsync at runtime)
+WORKDIR /home/node/.cache/fcc
+RUN --mount=type=bind,from=builder,source=/home/node/.cache/fcc,target=/tmp/fcc-build \
+    rsync -a --include='*/' --include='.turbo/***' --exclude='*' /tmp/fcc-build/ ./
+
+WORKDIR /workspaces/freeCodeCamp
diff --git a/docker/devcontainer/docker-bake.hcl b/docker/devcontainer/docker-bake.hcl
new file mode 100644
index 00000000000..68eba1f8c95
--- /dev/null
+++ b/docker/devcontainer/docker-bake.hcl
@@ -0,0 +1,50 @@
+// Docker Bake configuration for freeCodeCamp devcontainer images
+//
+// Usage (from repo root):
+//   docker buildx bake -f docker/devcontainer/docker-bake.hcl          # Local build (native platform)
+//   docker buildx bake -f docker/devcontainer/docker-bake.hcl devcontainer --push  # Push multi-arch to GHCR
+//
+// With custom tag:
+//   TAG=v1.0.0 docker buildx bake -f docker/devcontainer/docker-bake.hcl devcontainer --push
+
+variable "REGISTRY" {
+  default = "ghcr.io/freecodecamp"
+}
+
+variable "TAG" {
+  default = "latest"
+}
+
+variable "TAG_LATEST" {
+  default = "true"
+}
+
+group "default" {
+  targets = ["local-devcontainer"]
+}
+
+target "_common" {
+  context    = "."
+  dockerfile = "docker/devcontainer/Dockerfile"
+}
+
+// Multi-arch image for pushing to registry (CI and local --push)
+target "devcontainer" {
+  inherits   = ["_common"]
+  target     = "devcontainer"
+  platforms  = ["linux/amd64", "linux/arm64"]
+  cache-from = ["type=gha"]
+  cache-to   = ["type=gha,mode=max"]
+  tags       = concat(
+    ["${REGISTRY}/devcontainer:${TAG}"],
+    TAG_LATEST == "true" ? ["${REGISTRY}/devcontainer:latest"] : []
+  )
+}
+
+// Native platform only (fast local builds)
+target "local-devcontainer" {
+  inherits = ["_common"]
+  target   = "devcontainer"
+  output   = ["type=docker"]
+  tags     = ["ghcr.io/freecodecamp/devcontainer:latest"]
+}
diff --git a/docker/gitpod/Dockerfile b/docker/gitpod/Dockerfile
deleted file mode 100644
index 1095fe50ca6..00000000000
--- a/docker/gitpod/Dockerfile
+++ /dev/null
@@ -1,13 +0,0 @@
-FROM gitpod/workspace-mongodb:latest
-
-LABEL org.opencontainers.image.source=https://github.com/freecodecamp/freecodecamp \
-  org.opencontainers.image.description="A Gitpod image for the main freeCodeCamp repository" \
-  org.opencontainers.image.licenses=BSD-3-Clause
-
-# from https://www.gitpod.io/docs/introduction/languages/javascript#node-versions
-RUN bash -c 'VERSION="24" \
-  && source $HOME/.nvm/nvm.sh && nvm install $VERSION \
-  && nvm use $VERSION && nvm alias default $VERSION \
-  && npm i -g pnpm@10 \
-  && echo "nvm use default &>/dev/null" >> ~/.bashrc.d/51-nvm-fix \
-  && pnpm dlx playwright@1.47.1 install --with-deps chromium'