Update Dockerfile

Dockerfile

@@ -1,17 +1,46 @@
-# Use lightweight Python image
-FROM python:3.10-slim
+# Use slim Python image
+FROM python:3.11-slim
 
 WORKDIR /app
 
 # Install dependencies
-COPY requirements.txt .
-RUN pip install --no-cache-dir -r requirements.txt
+COPY backend/requirements.txt /app/backend/requirements.txt
+RUN pip install --no-cache-dir -r /app/backend/requirements.txt
 
-# Copy app code
-COPY . .
+# Copy backend
+COPY backend /app/backend
+
+# Copy frontend to a static dir served by Flask (optional) or via simple file server
+COPY frontend /app/frontend
+
+# Add a tiny static server via Flask for simplicity:
+# We'll modify backend/app.py at runtime to serve /frontend
+# Instead, we can use a simple nginx, but keep it minimal:
+RUN python - <<'PY'\n\
+import os\n\
+p = '/app/backend/app.py'\n\
+s = open(p).read()\n\
+addon = '''\n\
+from flask import send_from_directory\n\
+@app.route('/<path:path>')\n\
+def static_proxy(path):\n\
+    return send_from_directory('/app/frontend', path)\n\
+@app.route('/index.html')\n\
+def index_html():\n\
+    return send_from_directory('/app/frontend', 'index.html')\n\
+@app.route('/style.css')\n\
+def style_css():\n\
+    return send_from_directory('/app/frontend', 'style.css')\n\
+@app.route('/app.js')\n\
+def app_js():\n\
+    return send_from_directory('/app/frontend', 'app.js')\n\
+@app.route('/frontend')\n\
+def frontend_root():\n\
+    return send_from_directory('/app/frontend', 'index.html')\n\
+'''\n\
+open(p, 'w').write(s + '\\n' + addon)\n\
+PY
 
-# Expose port
 EXPOSE 7860
 
-# Run Flask
-CMD ["python", "app.py"]
+CMD ["gunicorn", "-w", "1", "-b", "0.0.0.0:7860", "backend.app:app"]