Changes in databse file to retrieve internal postgreSQL on render

Author: SuyashBhavalkar3

backend/Dockerfile

@@ -0,0 +1,57 @@
+# Multi-stage build for optimized image size
+FROM python:3.11-slim AS builder
+
+# Set working directory
+WORKDIR /app
+
+# Install system dependencies required for building
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    gcc \
+    libpq-dev \
+    && rm -rf /var/lib/apt/lists/*
+
+# Copy requirements and install Python dependencies
+COPY requirements.txt .
+RUN pip install --no-cache-dir --user -r requirements.txt
+
+# Final stage
+FROM python:3.11-slim
+
+# Set environment variables
+ENV PYTHONUNBUFFERED=1 \
+    PYTHONDONTWRITEBYTECODE=1 \
+    PIP_NO_CACHE_DIR=1 \
+    PYTHONPATH=/app
+
+# Set working directory
+WORKDIR /app
+
+# Install runtime system dependencies only
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    libpq5 \
+    && rm -rf /var/lib/apt/lists/*
+
+# Create non-root user for security
+RUN useradd -m -u 1000 appuser
+
+# Copy Python dependencies from builder
+COPY --from=builder --chown=appuser:appuser /root/.local /home/appuser/.local
+
+# Copy application code
+COPY --chown=appuser:appuser . .
+
+# Add local pip installation to PATH
+ENV PATH=/home/appuser/.local/bin:$PATH
+
+# Switch to non-root user
+USER appuser
+
+# Expose port (adjust if needed)
+EXPOSE 8000
+
+# Health check
+HEALTHCHECK --interval=30s --timeout=10s --start-period=40s --retries=3 \
+    CMD python -c "import urllib.request; urllib.request.urlopen('http://localhost:8000/').read()" || exit 1
+
+# Run the application
+CMD ["uvicorn", "main:app", "--host", "0.0.0.0", "--port", "8000"]

backend/database.py

@@ -1,8 +1,12 @@
 from sqlalchemy import create_engine
 from sqlalchemy.ext.declarative import declarative_base
 from sqlalchemy.orm import sessionmaker
+import os
+from dotenv import load_dotenv
+load_dotenv()
+
+DATABASE_URL = os.getenv("DATABASE_URL", "sqlite:///./app.db")
 
-DATABASE_URL = "sqlite:///./test.db"  # Change to PostgreSQL URL as needed
 
 engine = create_engine(DATABASE_URL, connect_args={"check_same_thread": False})
 SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)