Hackforge Academy

Explanation

A Dockerfile defines the Python runtime, dependencies, source code, and startup command.

Code:

FROM python:3.12-slim
WORKDIR /app
COPY . .
RUN pip install -r requirements.txt
CMD ['python', 'app.py']

Explanation

The requirements.txt file lists packages required by the Python application.

Code:

fastapi==0.115.0
uvicorn==0.30.6
boto3==1.35.0

Explanation

The docker build command creates a reusable image for the Python application.

Code:

docker build -t my-python-app .

Explanation

A container runs the application from the built image.

Code:

docker run -p 8000:8000 my-python-app

Explanation

AWS containers should use environment variables, correct ports, and standard output for logs.

Code:

import os
port = int(os.getenv('PORT', '8000'))
print(f'Listening on {port}')