Day 47: Containerize Python Apps Like a Pro – Docker Dockerfile Tutorial

Published: 24 November 2025
on channel: Madhukar Reddy
137
2

In today’s DevOps challenge, we containerize a Python application using a custom Dockerfile and deploy it as a running service inside the Stratos Datacenter. The Nautilus team provided a simple Python app along with a server.py and requirements.txt, and our task is to build a full Docker image and run the container with proper port mapping.

This hands-on exercise strengthens your understanding of Dockerfiles, Python environments inside containers, and application deployment using Docker.


FROM python:3.10-slim
WORKDIR /app
COPY . .
RUN pip install -r src/requirements.txt
EXPOSE 3001
CMD ["python", "src/server.py"]

docker build -t nautilus/python-app .
docker run -d --name pythonapp_nautilus -p 8095:3001 nautilus/python-app

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