Fix Dokploy Bad Gateway: panel-first compose and stable boot

Co-authored-by: Cursor <cursoragent@cursor.com>

docker-compose.yml

@@ -1,21 +1,5 @@
 services:
-  postgres:
-    image: postgres:16-alpine
-    restart: unless-stopped
-    environment:
-      POSTGRES_USER: ${POSTGRES_USER:-vpn}
-      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD:-vpn}
-      POSTGRES_DB: ${POSTGRES_DB:-vpn_panel}
-    volumes:
-      - postgres_data:/var/lib/postgresql/data
-    networks:
-      - vpn_net
-    healthcheck:
-      test: ["CMD-SHELL", "pg_isready -U $$POSTGRES_USER -d $$POSTGRES_DB"]
-      interval: 5s
-      timeout: 5s
-      retries: 10
-
+  # IMPORTANT for Dokploy: attach domain to this service, port 8000
   panel:
     build:
       context: .
@@ -24,6 +8,8 @@ services:
     depends_on:
       postgres:
         condition: service_healthy
+    expose:
+      - "8000"
     ports:
       - "${PANEL_PORT:-8000}:8000"
     environment:
@@ -39,7 +25,7 @@ services:
       POSTGRES_USER: ${POSTGRES_USER:-vpn}
       POSTGRES_PASSWORD: ${POSTGRES_PASSWORD:-vpn}
       POSTGRES_DB: ${POSTGRES_DB:-vpn_panel}
-      DATABASE_URL: postgresql+asyncpg://${POSTGRES_USER:-vpn}:${POSTGRES_PASSWORD:-vpn}@postgres:5432/${POSTGRES_DB:-vpn_panel}
+      DATABASE_URL: ${DATABASE_URL:-postgresql+asyncpg://vpn:vpn@postgres:5432/vpn_panel}
 
       PUBLIC_HOST: ${PUBLIC_HOST:-127.0.0.1}
       PUBLIC_PORT: ${PUBLIC_PORT:-51820}
@@ -62,8 +48,25 @@ services:
       test: ["CMD", "curl", "-f", "http://127.0.0.1:8000/health"]
       interval: 15s
       timeout: 5s
-      retries: 5
-      start_period: 20s
+      retries: 10
+      start_period: 90s
+
+  postgres:
+    image: postgres:16-alpine
+    restart: unless-stopped
+    environment:
+      POSTGRES_USER: ${POSTGRES_USER:-vpn}
+      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD:-vpn}
+      POSTGRES_DB: ${POSTGRES_DB:-vpn_panel}
+    volumes:
+      - postgres_data:/var/lib/postgresql/data
+    networks:
+      - vpn_net
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U $$POSTGRES_USER -d $$POSTGRES_DB"]
+      interval: 5s
+      timeout: 5s
+      retries: 10
 
 networks:
   vpn_net: