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docs: add MongoDB replica set setup guide #1282

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docs: add MongoDB replica set setup guide
anukritisrivastava810-source Mar 25, 2026
dd657a5
docs: fix MongoDB replica setu steps
anukritisrivastava810-source Mar 28, 2026
89a2992
docs: clarify MongoDB replica set setup in local setup guide
anukritisrivastava810-source Mar 28, 2026
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9 changes: 6 additions & 3 deletions src/content/docs/how-to-setup-freecodecamp-locally.mdx
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Expand Up @@ -328,17 +328,20 @@ pnpm install

### Step 3: Start MongoDB and Seed the Database

Before you can run the application locally, you will need to start a MongoDB Server as a replica set.
Before you can run the application locally, you will need to start a MongoDB server as a replica set.

freeCodeCamp uses Prisma with MongoDB, and some database operations require transaction support. MongoDB transactions require the server to run as a replica set, even in local development.

<Steps>

1. Stop any existing MongoDB server that uses port 27017 (if you already have a replica set running on that port, you can skip this and the next step)
1. Stop any existing MongoDB server that uses port `27017`.

If you already have a MongoDB server running without replica set mode, you may encounter errors when trying to initialize or use the database for local development.

1. Start the MongoDB server as a replica set:

```bash
docker compose -f docker/docker-compose.yml up -d
```

1. Seed the database and setup a new user:

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