Restructure Docker for Dokploy deployment

- Copy app code into PHP image, sync to shared volume at startup
- Use named volume (app_code) shared between app and nginx
- Build nginx image with embedded config (no bind mounts)
- Add .dockerignore to optimize image build
- Build context moved to project root for both services

docker-compose.yml

@@ -1,12 +1,13 @@
 services:
   app:
     build:
-      context: ./docker/php
+      context: .
+      dockerfile: docker/php/Dockerfile
     container_name: termanager2_app
     restart: unless-stopped
     working_dir: /var/www/html
     volumes:
-      - .:/var/www/html
+      - app_code:/var/www/html
       - storage_data:/var/www/html/storage/app
     networks:
       - termanager2
@@ -19,14 +20,15 @@ services:
       - PHP_OPCACHE_VALIDATE_TIMESTAMPS=1
 
   nginx:
-    image: nginx:1.25-alpine
+    build:
+      context: .
+      dockerfile: docker/nginx/Dockerfile
     container_name: termanager2_nginx
     restart: unless-stopped
     ports:
       - "${APP_PORT:-8080}:80"
     volumes:
-      - .:/var/www/html:ro
-      - ./docker/nginx/default.conf:/etc/nginx/conf.d/default.conf:ro
+      - app_code:/var/www/html:ro
     networks:
       - termanager2
     depends_on:
@@ -81,6 +83,8 @@ services:
       - termanager2
 
 volumes:
+  app_code:
+    driver: local
   db_data:
     driver: local
   redis_data: