fix(api): use port 27017 (#54220)

api/README.md

@@ -18,13 +18,6 @@ cd tools
 docker compose up -d
 ```
 
-Once that's running, update the connection string in the `.env` file to use port `27018`.
-
-```txt
-# Database
-MONGOHQ_URL=mongodb://127.0.0.1:27018/freecodecamp?directConnection=true
-```
-
 The new db will be empty, so you can run the seed script to populate it.
 
 ```bash

api/tools/docker-compose.yml

@@ -6,7 +6,7 @@ services:
     command: mongod --replSet rs0
     restart: unless-stopped
     ports:
-      - 27018:27017
+      - 27017:27017
     volumes:
       - db-data:/data
   setup: