Add Docker build/push and Dockge deploy workflow

- Add api/admin/upload Dockerfiles and .dockerignore
- Add deploy/docker-compose.yml (ports 3001-3004) and deploy/README.md
- Add scripts/docker-build-push.sh for Gitea registry push
- Add Gitea/SSH scripts and Google Drive controller updates

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

admin/nginx-default.conf

@@ -0,0 +1,9 @@
+server {
+    listen 80;
+    server_name localhost;
+    root /usr/share/nginx/html;
+    index index.html;
+    location / {
+        try_files $uri $uri/ /index.html;
+    }
+}