feat: switch to psycopg2 with temporary build tools in Dockerfile and add entrypoint.sh for smooth DB readiness and migrations

Dockerfile.backend

@@ -6,17 +6,26 @@ ENV PYTHONUNBUFFERED=1 \
 
 WORKDIR /app
 
-# Install system dependencies
+# Copy requirements file first
+COPY requirements.txt .
+
+# Install build dependencies for psycopg2, install pip requirements, then clean up build tools
 RUN apt-get update && apt-get install -y --no-install-recommends \
-    build-essential \
+    gcc \
+    python3-dev \
     libpq-dev \
+    libpq5 \
+    && pip install --no-cache-dir -r requirements.txt \
+    && apt-get purge -y --auto-remove gcc python3-dev libpq-dev \
     && rm -rf /var/lib/apt/lists/*
 
-# Copy requirements and install
-COPY requirements.txt .
-RUN pip install --no-cache-dir -r requirements.txt
+# Copy entrypoint script and set executable permissions
+COPY entrypoint.sh /app/entrypoint.sh
+RUN chmod +x /app/entrypoint.sh
 
-# Copy source code
+# Copy backend source code
 COPY backend /app/backend
 
 EXPOSE 8000
+
+ENTRYPOINT ["/app/entrypoint.sh"]

docker-compose.yml

@@ -33,7 +33,7 @@ services:
       context: .
       dockerfile: Dockerfile.backend
     container_name: divar_backend
-    command: sh -c "python backend/manage.py migrate && python backend/manage.py runserver 0.0.0.0:8000"
+    command: python backend/manage.py runserver 0.0.0.0:8000
     ports:
       - "8000:8000"
     environment:
@@ -54,7 +54,7 @@ services:
       context: .
       dockerfile: Dockerfile.backend
     container_name: divar_celery
-    command: sh -c "celery -A config worker --loglevel=info -P gevent -c 20"
+    command: celery -A config worker --loglevel=info -P gevent -c 20
     environment:
       - REDIS_URL=redis://redis:6379/0
       - POSTGRES_HOST=db

entrypoint.sh

@@ -0,0 +1,34 @@
+#!/bin/sh
+set -e
+
+# Wait for PostgreSQL database connection if POSTGRES_HOST is specified
+if [ -n "$POSTGRES_HOST" ]; then
+    echo "Waiting for PostgreSQL database ($POSTGRES_HOST)..."
+    while ! python -c "
+import os, sys, psycopg2
+try:
+    conn = psycopg2.connect(
+        dbname=os.getenv('POSTGRES_DB', 'divar_crawler'),
+        user=os.getenv('POSTGRES_USER', 'postgres'),
+        password=os.getenv('POSTGRES_PASSWORD', 'postgres'),
+        host=os.getenv('POSTGRES_HOST', 'db'),
+        port=os.getenv('POSTGRES_PORT', '5432'),
+        connect_timeout=2
+    )
+    conn.close()
+    sys.exit(0)
+except Exception:
+    sys.exit(1)
+" 2>/dev/null; do
+        sleep 1
+    done
+    echo "PostgreSQL database is ready!"
+fi
+
+# Automatically run Django migrations before starting backend server
+if [ "$1" = "python" ] && [ "$2" = "backend/manage.py" ] && [ "$3" = "runserver" ]; then
+    echo "Running Django migrations..."
+    python backend/manage.py migrate --noinput
+fi
+
+exec "$@"

requirements.txt

@@ -3,7 +3,8 @@ djangorestframework>=3.18.0,<3.19
 django-cors-headers>=4.9.0,<4.10
 celery>=5.6.3,<5.7
 redis>=8.1.0,<8.2
-psycopg2-binary>=2.9.12,<2.10
+psycopg2>=2.9.9,<2.10
+
 django-celery-beat>=2.9.0,<2.10
 requests>=2.34.2,<2.35
 openai>=2.53.0,<2.54