diff --git a/.github/workflows/build-docker-image.yml b/.github/workflows/build-docker-image.yml
new file mode 100644
index 0000000000..7d0a44c3e7
--- /dev/null
+++ b/.github/workflows/build-docker-image.yml
@@ -0,0 +1,23 @@
+# Make sure the Docker container still builds
+
+name: Build Docker image
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches-ignore:
+      - translations
+
+env:
+  CI: true
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out repo
+        uses: actions/checkout@5a4ac9002d0be2fb38bd78e4b4dbde5606d7042f
+      - name: Build the container
+        run: docker build .
diff --git a/Dockerfile b/Dockerfile
index 59846b78f6..6e5205f763 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -7,18 +7,21 @@
 # A temporary image that installs production-only dependencies
 
 FROM node:14-alpine as installation
+RUN apk add --no-cache python make g++
 ENV NODE_ENV production
 WORKDIR /usr/src/docs
 COPY package*.json ./
 
 # Install the project's dependencies
-RUN npm ci
+RUN npm ci --production
 
 # --------------------------------------------------------------------------------
 # BUNDLE IMAGE
 # A temporary image that installs dependencies and builds the production-ready front-end bundles.
 
 FROM node:14-alpine as bundles
+RUN apk add --no-cache python make g++
+ENV NODE_ENV production
 WORKDIR /usr/src/docs
 # Install the files used to create the bundles
 COPY package*.json ./
@@ -27,7 +30,8 @@ COPY stylesheets ./stylesheets
 COPY lib ./lib
 COPY webpack.config.js ./webpack.config.js
 # Install the project's dependencies and build the bundles
-RUN npm ci && npm run build
+RUN npm ci --production
+RUN npm run build
 
 # --------------------------------------------------------------------------------
 # MAIN IMAGE
@@ -52,16 +56,23 @@ COPY --chown=node:node --from=bundles /usr/src/docs/dist /usr/src/docs/dist
 # We should always be running in production mode
 ENV NODE_ENV production
 
+# Use Lunr instead of Algolia
+ENV USE_LUNR true
+
 # Copy only what's needed to run the server
 COPY --chown=node:node assets ./assets
 COPY --chown=node:node content ./content
 COPY --chown=node:node data ./data
 COPY --chown=node:node includes ./includes
+COPY --chown=node:node layouts ./layouts
 COPY --chown=node:node lib ./lib
 COPY --chown=node:node middleware ./middleware
 COPY --chown=node:node translations ./translations
 COPY --chown=node:node server.js ./server.js
 COPY --chown=node:node package*.json ./
+COPY --chown=node:node feature-flags.json ./
 
+EXPOSE 80
 EXPOSE 443
+EXPOSE 4000
 CMD ["node", "server.js"]