Update Dockerfile

Dockerfile

@@ -1,34 +1,39 @@
-# Use the official Python slim image for a smaller footprint
-FROM python:3.11-slim
-
-# Set the working directory in the container
-WORKDIR /app
-
-# Install system dependencies (e.g., for psycopg2 if using PostgreSQL)
-RUN apt-get update && apt-get install -y --no-install-recommends \
-    gcc \
-    python3-dev \
-    libpq-dev \
-    && rm -rf /var/lib/apt/lists/*
-
-# Copy the requirements file first to leverage Docker cache
-COPY requirements.txt .
-
-# Install Python dependencies
-RUN pip install --no-cache-dir -r requirements.txt
-
-# Copy the entire application code
-COPY . .
-
-# Ensure static files are collected (if using Flask's static folder)
-RUN mkdir -p /app/static
-
-# Expose the port (Render or other platforms may override this)
-EXPOSE 5000
-
-# Set environment variables for Flask and Gunicorn
-ENV FLASK_ENV=production
-ENV PYTHONUNBUFFERED=1
-
-# Command to run the application with gunicorn
-CMD ["gunicorn", "--bind", "0.0.0.0:5000", "--workers", "3", "--timeout", "120", "app:app"]
+# Use the official Python slim image for a smaller footprint
+FROM python:3.11-slim
+
+# Set the working directory
+WORKDIR /app
+
+# Install system dependencies for psycopg2 and other potential native extensions
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    gcc \
+    python3-dev \
+    libpq-dev \
+    && rm -rf /var/lib/apt/lists/*
+
+# Copy requirements file to leverage Docker cache
+COPY requirements.txt .
+
+# Install Python dependencies
+RUN pip install --no-cache-dir -r requirements.txt
+
+# Copy the entire application code
+COPY . .
+
+# Ensure static files directory exists
+RUN mkdir -p /app/static /app/templates
+
+# Expose port 5000 (Render may override)
+EXPOSE 5000
+
+# Set environment variables for production
+ENV FLASK_ENV=production
+ENV PYTHONUNBUFFERED=1
+ENV GUNICORN_CMD_ARGS="--workers=3 --timeout=120 --log-level=info"
+
+# Command to run the application with gunicorn
+CMD ["gunicorn", "--bind", "0.0.0.0:5000", "app:app"]
+
+# Health check to ensure the app is responsive
+HEALTHCHECK --interval=30s --timeout=5s --start-period=10s --retries=3 \
+    CMD curl -f http://localhost:5000/health || exit 1