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

.dockerignore

@@ -0,0 +1,22 @@
+.git
+.gitignore
+.env
+vendor
+node_modules
+storage/logs/*
+storage/framework/cache/*
+storage/framework/sessions/*
+storage/framework/views/*
+bootstrap/cache/*
+public/build
+public/storage
+db_data
+redis_data
+docker-compose.yml
+docker-compose.override.yml
+README.md
+TerManager2_v2.md
+.idea
+.vscode
+*.swp
+*.swo