fix: remove PostgreSQL initialization from entrypoint and update Docker configuration for external database

Dockerfile.allinone

@@ -29,14 +29,10 @@ ENV DEBIAN_FRONTEND=noninteractive
 
 RUN apt-get update && apt-get install -y \
     nginx \
-    postgresql \
     supervisor \
     openjdk-21-jre-headless \
     && rm -rf /var/lib/apt/lists/*
 
-# PostgreSQL data directory
-RUN mkdir -p /var/lib/postgresql/data && chown -R postgres:postgres /var/lib/postgresql
-
 # Copy frontend static files
 COPY --from=frontend-build /app/frontend/dist /usr/share/nginx/html