ok this seems to work

docker-compose.yml

@@ -1,45 +1,14 @@
 version: '3'
 
 services:
-  express:
+  app:
     build: .
-    user: "${UID:-1000}:${GID:-1000}"
-    ports:
-      - "3000:3000"
-    volumes:
-      - ./container-data:/app/data
-    networks:
-      - app_network
-    depends_on:
-      postgres:
-        condition: service_healthy
-
-  caddy:
-    image: caddy:2
     ports:
       - "80:80"
-    volumes:
-      - ./caddy:/etc/caddy
-    networks:
-      - app_network
-    depends_on:
-      - express
-
-  postgres:
-    image: postgres
-    environment:
-      POSTGRES_USER: ${POSTGRES_USER}
-      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD}
-      POSTGRES_DB: ${POSTGRES_DB}
-    ports:
+      - "3000:3000"
       - "5432:5432"
-    networks:
-      - app_network
-    healthcheck:
-      test: [ "CMD", "pg_isready", "-U", "${POSTGRES_USER}", "-d", "${POSTGRES_DB}" ]
-      interval: 1s
-      retries: 10
-
-networks:
-  app_network:
-    driver: bridge
+    environment:
+      - POSTGRES_HOST=${POSTGRES_HOST}
+      - POSTGRES_USER=${POSTGRES_USER}
+      - POSTGRES_PASSWORD=${POSTGRES_PASSWORD}
+      - POSTGRES_DB=${POSTGRES_DB}