Update Dockerfile

Author: LightLLM

backend/Dockerfile

@@ -0,0 +1,42 @@
+# Use Python 3.12.1 for smaller image size
+FROM python:3.12.1
+
+# Set environment variables
+ENV PYTHONDONTWRITEBYTECODE=1
+ENV PYTHONUNBUFFERED=1
+
+# Set work directory
+WORKDIR /app
+
+# Install system dependencies (if needed)
+RUN apt-get update && apt-get install -y \
+    gcc \
+    && rm -rf /var/lib/apt/lists/*
+
+# Copy requirements first (for better Docker layer caching)
+COPY requirements.txt .
+
+# Install Python dependencies
+RUN pip install --no-cache-dir --upgrade pip
+RUN pip install --no-cache-dir -r requirements.txt
+
+# Copy application code (secrets excluded by .dockerignore)
+COPY . .
+
+# Create non-root user for security
+RUN adduser --disabled-password --gecos '' appuser
+RUN chown -R appuser:appuser /app
+USER appuser
+
+# Expose port
+EXPOSE 8000
+
+# Health check (optional)
+HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
+    CMD curl -f http://localhost:8000/docs || exit 1
+
+# Command to run FastAPI with uvicorn
+# Adjust the module:app part based on your file structure:
+# If your FastAPI app is in main.py: uvicorn main:app
+# If your FastAPI app is in app.py: uvicorn app:app
+CMD ["uvicorn", "app:app", "--host", "0.0.0.0", "--port", "8000"]