GitHub Docker Container Action

Build, package, and test custom GitHub Actions using Docker containers.

Not what you need? For running sidecar services (Redis, PostgreSQL, etc.) in CI workflows, see the github-service-containers skill.

Prerequisites

• Repository on GitHub (public, internal, or private)
• Basic understanding of GitHub Actions and Docker
• Self-hosted runners must run Linux with Docker installed

Security: Always treat workflow inputs as untrusted. Avoid script injection via ${{ }} in run: blocks.

Workflow: Creating a Docker Action

Step 1: Create project structure