~/signup holds a working stack. Read the file before you run it; note the first line.

Start it and list the containers:

docker compose up -d
docker compose ps

Read the database logs:

Add two signups through the app:

curl -s -X POST 'localhost:8000/signup?name=ada'
curl -s -X POST 'localhost:8000/signup?name=grace'
curl -s localhost:8000

Read the rows directly from Postgres inside the db service:

The app logged each request:

Finally, print the configuration Compose resolved from the file: