How to Dockerize a Full-Stack Python Application

Publicado em: 10 Março 2026
no canal de: Super SQA | QA Automation
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Mastering Docker is non-negotiable for modern engineers. Learn how to containerize real-world apps to ensure seamless deployments and high-status engineering architectural skills.

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In this video, I walk you through the real-world process of Dockerizing a professional application called DoroSocial. We move from a local host setup to a fully containerized architecture using Docker and Docker Compose.

I break down the step-by-step approach of containerizing the frontend (Flask), the backend (FastAPI), and the MySQL database. You'll see the exact challenges I faced with container networking, specifically why 'localhost' fails inside a container and how to use 'host.docker.internal' to bridge the gap.

We also dive deep into data persistence. I explain why Docker volumes are critical for databases and local file storage, and why I eventually transitioned to a more professional cloud storage solution using DigitalOcean Spaces (S3-compatible storage) for auto-generated media files.

Finally, I demonstrate how Docker Compose coordinates these multi-container services into a single, scalable network.

Chapters:
0:00 Intro to Dockerizing DoroSocial
1:50 Understanding the App Architecture
3:20 The Localhost Networking Challenge
6:40 Dockerizing the Frontend (Flask)
8:30 Dockerizing the Backend (FastAPI)
10:45 Managing Environment Variables & API Keys
13:10 Solving Data Persistence with Volumes
16:15 Modernizing Storage with Cloud Spaces
18:40 Coordinating Services with Docker Compose
21:10 Next Steps: CI/CD Pipeline

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#docker #containerization #backendengineering #devops #softwareengineering


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