OrigamiPedia: A Docker Compose Project for a Three-Tier Origami Tutorial App

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OrigamiPedia gathers scattered origami tutorials into one catalog, filterable by difficulty (easy, medium, hard) with sequential steps. The developer built it partly as a practice project for designing a three-tier application orchestrated with Docker Compose. The app runs in three containers on a shared network: a Flask app served by Gunicorn, PostgreSQL 16 with persistent storage, and an optional Adminer tool for inspecting the database. The Dockerfile uses a multi-stage build to keep build tools out of the final image, and the database is reachable only from within the network, not from localhost.

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