fix: Update ports to avoid conflicts with existing Docker projects

- Change Gitea port from 3000 to 3001
- Change API port from 8080 to 8082
- Change Nginx port from 80 to 8083
- Add docker-compose.override.yml for local development
- Add deployment guide for existing servers

server/docker-compose.override.yml

@@ -0,0 +1,31 @@
+# Docker Compose Override for Development/Local Testing
+# Usage: docker compose -f docker-compose.yml -f docker-compose.override.yml up
+
+services:
+  # Use standard ports for local development
+  gitea:
+    ports:
+      - "3000:3000"
+      - "222:22"
+    environment:
+      - GITEA__server__ROOT_URL=http://localhost:3000
+      - GITEA__server__SSH_PORT=222
+
+  postgres:
+    ports:
+      - "5432:5432"
+
+  nanaxe-api:
+    ports:
+      - "8080:8080"
+    environment:
+      - NODE_ENV=development
+
+  nginx:
+    ports:
+      - "80:80"
+      - "443:443"
+
+  webdav:
+    ports:
+      - "8081:80"