fix: brought back postgress that we removed in the last commit, and added persistent folder for it

docker-compose.yml

@@ -12,6 +12,9 @@ services:
       - ./data/firebase-service-account.json:/app/firebase-service-account.json:ro
     ports:
       - "8000:8000"
+    depends_on:
+      postgres:
+        condition: service_healthy
     networks:
       - internal
 
@@ -40,6 +43,24 @@ services:
     networks:
       - internal
 
+  postgres:
+    image: postgres:16-alpine
+    container_name: bellsystems-postgres
+    restart: unless-stopped
+    environment:
+      POSTGRES_DB: ${POSTGRES_DB}
+      POSTGRES_USER: ${POSTGRES_USER}
+      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD}
+    volumes:
+      - ./data/postgres:/var/lib/postgresql/data
+    networks:
+      - internal
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U ${POSTGRES_USER} -d ${POSTGRES_DB}"]
+      interval: 10s
+      timeout: 5s
+      retries: 5
+
 networks:
   internal:
     driver: bridge