feat: Add FaceAI integration with handoff and return functionality

- Introduced a new workspace for FaceAI in package.json.
- Implemented FaceAI handoff logic in faceai_handoff.php, including identity verification and token signing.
- Created faceai_return.php to handle return requests from FaceAI, validating tokens and forwarding results.
- Developed faceai_simulator.php and faceai_simulator_view.php for simulating the FaceAI interface with demo photos.
- Enhanced rus-ecom-240621.js to support new FaceAI features, including dynamic URL building and button integration.
- Added faceai_config.php for configuration management, including environment variable handling and utility functions.
- Updated HTML structure and styles in simulator view for better user experience.

faceai/docker/Dockerfile

@@ -0,0 +1,24 @@
+FROM node:20-alpine AS build
+
+WORKDIR /app
+
+COPY package.json ./
+COPY apps/frontend/package.json apps/frontend/package.json
+COPY apps/backend/package.json apps/backend/package.json
+
+RUN npm install
+
+COPY . .
+
+RUN npm run build
+
+FROM node:20-alpine AS runtime
+
+WORKDIR /app
+
+COPY --from=build /app /app
+
+ENV NODE_ENV=production
+EXPOSE 3001
+
+CMD ["npm", "run", "start"]