render.yaml

# render.yaml
databases:
  - name: myapp-db        # Name for the PostgreSQL database
    plan: free            # Use free tier database
    region: oregon        # (Optional) choose closest region for database
    databaseName: myapp   # Initial db name
    user: myapp           # DB username

services:
  - type: web
    name: myapp-web       # Name of the web service
    runtime: python
    region: oregon        # Same region as database for low latency
    plan: free
    env: docker           # use Docker environment (necessary for Python)
    buildCommand: "./build.sh"
    startCommand: "gunicorn mysite.wsgi:application"
    envVars:
      - key: DATABASE_URL         # Render will fill this with the database's URL
        fromDatabase:
          name: myapp-db
          property: connectionString
      - key: SECRET_KEY           # Use the SECRET_KEY from Render's generated env vars
        generateValue: true
      - key: ALLOWED_HOSTS        # (Optional) you could set allowed hosts via env
        value: myapp-web.onrender.com