Initial commit: 3D Viewer application

Features:
- Vue 3 frontend with Three.js/Online3DViewer
- Node.js API with PostgreSQL and Redis
- Python worker for model conversion
- Docker Compose for deployment
- ViewCube navigation with drag rotation and 90° snap
- Cross-section, exploded view, and render settings
- Parts tree with visibility controls

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

frontend/Dockerfile

@@ -0,0 +1,41 @@
+# Build stage
+FROM node:20-alpine AS builder
+
+WORKDIR /app
+
+# Accept build arg for API URL
+ARG VITE_API_URL=http://localhost:3000
+ENV VITE_API_URL=$VITE_API_URL
+
+# Install pnpm
+RUN corepack enable && corepack prepare pnpm@latest --activate
+
+# Copy package files
+COPY package.json pnpm-lock.yaml* ./
+
+# Install dependencies
+RUN pnpm install
+
+# Copy source code
+COPY . .
+
+# Build the application
+RUN pnpm build
+
+# Production stage with nginx
+FROM nginx:alpine AS runner
+
+# Copy custom nginx config
+COPY nginx.conf /etc/nginx/conf.d/default.conf
+
+# Copy built assets
+COPY --from=builder /app/dist /usr/share/nginx/html
+
+# Expose port
+EXPOSE 80
+
+# Health check
+HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
+  CMD wget -q --spider http://localhost/ || exit 1
+
+CMD ["nginx", "-g", "daemon off;"]