Add Docker Support for Scribbler

[EXTREMOPHILARUM]

Issue Number 🔢

• Reference: #113

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Issue Description 🛠️

• Describe the problem this pull request is solving:

  • Users currently need to manually set up a web server to run Scribbler locally
  • Different platforms require different setup steps (Python http.server, npx serve, nginx/apache)
  • This creates friction for new users and inconsistency across development environments
  • No automated Docker image publishing for easy distribution

• How this PR addresses it:

  • Adds Dockerfile using nginx:alpine as a lightweight web server
  • Adds docker-compose.yml for easy orchestration
  • Implements GitHub Actions workflow for automated Docker image building and publishing to DockerHub
  • Enables one-command deployment with docker-compose up or docker run
  • Updates README with comprehensive Docker usage instructions

• What Problem You Solve? 💡

  • Eliminates manual web server setup
  • Provides consistent environment across all platforms (Windows, Mac, Linux)
  • Simplifies deployment to a single command
  • Maintains the "nodeless" philosophy while providing modern containerization
  • Enables automated CI/CD for Docker images with proper versioning

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Additional Information (Optional) ℹ️

• Technical details:

  • Uses nginx:alpine base image (only ~45MB total size)
  • Exposes port 8080 on host, mapping to port 80 in container
  • No build process required - serves static files directly
  • Optional volume mounting available for development mode (commented in docker-compose.yml)
  • GitHub Actions workflow supports:
    • Multi-platform builds (linux/amd64, linux/arm64)
    • Semantic versioning tags
    • Automatic latest tag for main branch
    • Build caching for faster CI runs

• Files added/modified:

  • Added: Dockerfile - Container definition
  • Added: docker-compose.yml - Docker Compose orchestration
  • Added: .github/workflows/docker-publish.yml - CI/CD pipeline
  • Modified: README.md - Added Docker installation instructions

• Required GitHub Secrets for CI/CD:

  • DOCKERHUB_USERNAME - DockerHub username
  • DOCKERHUB_TOKEN - DockerHub access token

• No impact on existing codebase:

  • Only adds new files for Docker support
  • Does not modify any existing functionality
  • Fully backward compatible - users can still use traditional hosting methods

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Checklist ✅

• Testing: Docker container builds successfully and serves application on http://localhost:8080 🧪
• Read the Rules and Guidelines: PR follows project guidelines, commit message format follows conventions 📜

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Screenshots or Video Demonstration (Optional) 📸

Earlier Output	Current Output
Manual setup required: python -m http.server or npx serve Different commands for different systems	Simple Docker deployment: docker-compose up Works identically on all platforms

[satyaakam]

Does scribbler releases have tag or labels ? "ERROR: failed to build: invalid tag "/scribbler:pr-115": invalid reference format" , oh its not able to even pull this pr ?