fix: Remove redundant public folder copy

- Astro build already copies public/ to dist/
- Separate public copy was unnecessary
- Only copy dist folder (contains everything including favicon)
- Fixes favicon 404 error

Dockerfile

@@ -0,0 +1,42 @@
+# Build Stage
+FROM node:20-alpine AS builder
+
+WORKDIR /app
+
+# Copy package files
+COPY package*.json ./
+
+# Install dependencies
+RUN npm ci
+
+# Copy source code
+COPY . .
+
+# Build the project
+RUN npm run build
+
+# Production Stage
+FROM node:20-alpine
+
+WORKDIR /app
+
+# Copy package files
+COPY package*.json ./
+
+# Install production dependencies only
+RUN npm ci --production
+
+# Copy built assets from builder
+COPY --from=builder /app/dist ./dist
+COPY --from=builder /app/public ./public
+COPY --from=builder /app/astro.config.mjs ./
+
+# Expose port
+EXPOSE 4321
+
+# Health check
+HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
+  CMD node -e "require('http').get('http://localhost:4321', (r) => {process.exit(r.statusCode === 200 ? 0 : 1)})"
+
+# Start the server
+CMD ["npm", "run", "preview", "--", "--host", "0.0.0.0", "--port", "4321"]