Add Docker support and implement Bun for dependency management

- Introduced .dockerignore to exclude unnecessary files from Docker context.
- Updated Dockerfile to use Bun for building and running the application.
- Removed entrypoint.sh as it is no longer needed.
- Modified build-and-dockerise.yml to set up Bun and install dependencies.
- Enhanced index.html with improved structure and hover effects.
- Updated client.ts to include tooltips for music display.
- Implemented caching in server.ts for Last.fm data.
- Added custom styles for hover effects and tooltips in style.css.

.forgejo/workflows/build-and-dockerise.yml

@@ -26,12 +26,17 @@ jobs:
         with:
           fetch-depth: 0 # Recommended for metadata action
 
-      - name: Install pnpm dependencies
-        run: pnpm i
+      - name: Setup Bun
+        uses: oven-sh/setup-bun@v2
+        with:
+          bun-version: latest
+
+      - name: Install dependencies
+        run: bun install
         shell: sh
 
       - name: Build project
-        run: pnpm run build
+        run: bun run build
         shell: sh
 
       - name: Set up Docker Buildx