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@@ -1,38 +1,27 @@
-# ════════════════════════════════════════════════
-# Chat Arena — Dockerfile
-# Multi-AI Model Chat Application
-# ════════════════════════════════════════════════
+FROM python:3.11-slim
 
-FROM python:3.11-slim AS base
-
-# System deps
 RUN apt-get update && apt-get install -y --no-install-recommends \
-    curl \
+    curl libpq-dev gcc \
     && rm -rf /var/lib/apt/lists/*
 
 WORKDIR /app
 
-# Install Python dependencies
 COPY backend/requirements.txt ./backend/requirements.txt
 RUN pip install --no-cache-dir -r backend/requirements.txt
 
-# Copy source
 COPY backend/ ./backend/
 COPY frontend/ ./frontend/
 
-# Create data directory for SQLite
 RUN mkdir -p /app/data
 
-# Environment
 ENV PYTHONPATH=/app
 ENV DATABASE_URL=sqlite:////app/data/chat_arena.db
 ENV DEBUG=false
 
-EXPOSE 8000
+EXPOSE 7860
 
-# Health check
-HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
-  CMD curl -f http://localhost:8000/api/health || exit 1
+HEALTHCHECK --interval=30s --timeout=10s --start-period=10s --retries=3 \
+  CMD curl -f http://localhost:7860/api/health || exit 1
 
-# Run
-CMD ["uvicorn", "backend.main:app", "--host", "0.0.0.0", "--port", "8000", "--workers", "2"]
+# Single worker — avoids PostgreSQL race condition on startup
+CMD ["uvicorn", "backend.main:app", "--host", "0.0.0.0", "--port", "7860", "--workers", "1"]