GitHub Actions Tutorial (Practical Guide)

included docker build and push on Docker hub automatically

1. What is GitHub Actions?

• Run workflows on events like push, PR, tag, cron, etc.

• Define custom build/test/deploy jobs

• Commonly used for testing, building, and Docker publishing

2. Directory Structure

3. Basic Workflow Example

4. Managing Secrets

1. Go to GitHub → Repo Settings → Secrets → Actions

2. Add:
• DOCKER_USERNAME
• DOCKER_PASSWORD (or access token)

3. Use via ${{ secrets.NAME }}

5. Docker Build + Push Example

6. Manual Trigger

7. Logs and Debug

• Go to GitHub → Actions → Select a job → View logs step-by-step.

8. Real Use Cases

Advanced

• Auto-upload build artifacts to Releases

• Email/Slack notifications on failure

• GitOps with ArgoCD or Flux

• Deploy to HuggingFace, GHCR, etc.