feat: init mirror-proxy project

- Docker Hub / GHCR / GitHub reverse proxy
- Web admin panel with link management
- Dynamic admin path, user and password config
- Rate limiting per link (dual/single auth mode)
- Docker and docker-compose deployment support
- GitHub Actions workflow for auto-publish to GHCR

docker-compose.yml

@@ -0,0 +1,12 @@
+services:
+  mirror-proxy:
+    build: .
+    container_name: mirror-proxy
+    restart: unless-stopped
+    ports:
+      - "8080:8080"
+    volumes:
+      - ./config.json:/app/config.json
+      - ./cache:/app/cache
+    environment:
+      - TZ=Asia/Shanghai