feat: Implement frontend asset build process and update Docker configuration

- Added a new build script using esbuild to bundle JavaScript and CSS assets, including Tailwind CSS and Font Awesome.
- Updated the Dockerfile to include a multi-stage build process for frontend assets, ensuring efficient image creation.
- Enhanced GitHub workflows to automate the installation of Node.js dependencies and build frontend assets during CI/CD.
- Introduced a .gitignore entry for the dist directory to prevent unnecessary files from being tracked.
- Improved caching and content type handling for static files served by the application.

Dockerfile

@@ -1,3 +1,32 @@
+# Build frontend assets
+FROM node:20-alpine AS frontend-builder
+
+WORKDIR /app
+
+# Copy all files needed for the build first
+COPY package.json package-lock.json ./
+COPY build.js ./
+COPY static/ ./static/
+COPY tailwind.config.js ./
+
+# Debug: Show the contents of build.js
+RUN echo "Contents of build.js:" && cat build.js
+
+# Remove the build script from postinstall
+RUN sed -i 's/"postinstall": "npm run build",//' package.json
+
+# Install dependencies and build with verbose output
+RUN npm ci && \
+    echo "Building frontend assets..." && \
+    node build.js && \
+    echo "Build complete. Contents of dist:" && \
+    ls -la static/dist/ && \
+    echo "Sample of app.js:" && \
+    head -n 10 static/dist/app.js && \
+    echo "Sample of app.css:" && \
+    head -n 10 static/dist/app.css
+
+# Go build stage
 FROM golang:1.24-alpine AS builder
 
 WORKDIR /app
@@ -17,7 +46,20 @@ RUN go install github.com/a-h/templ/cmd/templ@latest
 COPY go.mod go.sum ./
 RUN go mod download
 
-# Copy the rest of the source code
+# Create static directory structure
+RUN mkdir -p /app/static/dist
+
+# Copy built frontend assets from frontend-builder BEFORE copying Go source
+COPY --from=frontend-builder /app/static/dist/ /app/static/dist/
+
+# Copy the rest of the static files
+COPY static/ /app/static/
+
+# Verify static files are in place before Go build
+RUN echo "Verifying static files before Go build:" && \
+    ls -la /app/static/dist/
+
+# Now copy the rest of the source code
 COPY . .
 
 # Generate template files from .templ files
@@ -61,8 +103,7 @@ RUN addgroup -g ${GID} ${USERNAME} && \
 COPY --from=builder /app/gomft /app/
 COPY --from=builder /usr/local/bin/rclone /usr/local/bin/rclone
 
-# Copy static files and configurations
-COPY static/ /app/static/
+# Copy components
 COPY components/ /app/components/
 
 # Copy entrypoint script