Compose sample FastAPI application

Project structure 

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├── compose.yaml
├── Dockerfile
├── requirements.txt
├── app
   ├── main.py
   ├── __init__.py

compose.yaml 

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services:
api:
    build: .
    container_name: fastapi-application
    environment:
    PORT: 8000
    ports:
    - '8000:8000'
    restart: "no"

main.py 

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from fastapi import FastAPI

app = FastAPI()


@app.get("/")
def hello_world():
    return {"message": "OK"}

Deploy with docker compose 

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docker-compose up -d --build

Expected result

Listing containers must show one container running and the port mapping as below.

run: docker ps

After the application starts, navigate to http://localhost:8000 in your web browser and you should see the following json response:

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{
"message": "OK"
}

Stop and remove the containers 

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$ docker compose down