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Docker for Python Web Apps: From Flask Hello World to Production Deployment | Complete Guide

Updated: March 18, 2026

Docker turns "mystery meat environments" into something you can point at and trust. This post shows how containers cut down "works on my machine" bugs, how to ship a tiny Flask app with a clean Dockerfile, and how Compose makes the stack (Flask + Postgres) reproducible with one command. You'll also get the practical gotchas: caching layers, binding to 0.0.0.0, deps like psycopg2, and why "depends_on" doesn't mean "ready." read on »

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