Update backend Dockerfile for panel.zoneco.org and fix package permissions.

Dockerfile

@@ -1,78 +1,62 @@
-# Multi-stage Dockerfile for Django application
-# Stage 1: Builder stage - Install dependencies
-FROM python:3.11-slim as builder
+# Multi-stage Dockerfile for Django backend (zonco site API)
+# - funzone-site/docker-compose.yml: dev (runserver + bind mount)
+# - site_backend/docker-compose.yml: prod (gunicorn)
+
+FROM python:3.11-slim AS builder
 
-# Set environment variables
 ENV PYTHONDONTWRITEBYTECODE=1 \
     PYTHONUNBUFFERED=1 \
     PIP_NO_CACHE_DIR=1 \
     PIP_DISABLE_PIP_VERSION_CHECK=1
 
-# Install system dependencies required for building Python packages
 RUN apt-get update && apt-get install -y --no-install-recommends \
     gcc \
     postgresql-client \
     libpq-dev \
     && rm -rf /var/lib/apt/lists/*
 
-# Create and set working directory
 WORKDIR /app
 
-# Copy requirements file
 COPY requirements.txt .
-
-# Install Python dependencies
 RUN pip install --upgrade pip && \
     pip install --user -r requirements.txt
 
-# Stage 2: Production stage - Minimal runtime image
 FROM python:3.11-slim
 
-# Set environment variables
 ENV PYTHONDONTWRITEBYTECODE=1 \
     PYTHONUNBUFFERED=1 \
-    PATH="/home/django/.local/bin:$PATH"
+    PATH="/home/django/.local/bin:$PATH" \
+    POSTGRES_HOST=db \
+    POSTGRES_PORT=5432 \
+    ALLOWED_HOSTS=localhost,127.0.0.1,0.0.0.0,panel.zoneco.org
 
-# Install runtime dependencies only
 RUN apt-get update && apt-get install -y --no-install-recommends \
     postgresql-client \
     libpq5 \
     bash \
+    curl \
     && rm -rf /var/lib/apt/lists/*
 
-# Create non-root user for security
 RUN groupadd -r django && useradd -r -g django django
 
-# Create necessary directories
 RUN mkdir -p /app/staticfiles /app/media && \
     chown -R django:django /app
 
-# Set working directory
 WORKDIR /app
 
-# Copy Python dependencies from builder stage
 COPY --from=builder /root/.local /home/django/.local
+RUN chown -R django:django /home/django/.local
 
-# Copy project files
 COPY --chown=django:django . .
-
-# Copy and set permissions for entrypoint script
 COPY --chown=django:django entrypoint.sh /app/entrypoint.sh
 RUN chmod +x /app/entrypoint.sh
 
-# Switch to non-root user
 USER django
 
-# Expose port
 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/api/')" || exit 1
+    CMD curl -f http://localhost:8000/api/ || exit 1
 
-# Use entrypoint script
 ENTRYPOINT ["/app/entrypoint.sh"]
-
-# Default command (can be overridden in docker-compose)
 CMD ["gunicorn", "zonco_backend.wsgi:application", "--bind", "0.0.0.0:8000", "--workers", "3", "--timeout", "120"]
-