chore(repo): format codebase and refine docs

deploy/.env.example

@@ -0,0 +1,13 @@
+R_HOST=r.your-domain.example
+S_HOST=s.your-domain.example
+ACME_EMAIL=ops@your-domain.example
+XREAD_IMAGE=ghcr.io/xixu-me/xread:latest
+PUBLIC_HTTP_PORT=80
+PUBLIC_HTTPS_PORT=443
+XREAD_LOOPBACK_HOST=127.0.0.1
+XREAD_CRAWL_LOOPBACK_PORT=3001
+XREAD_SEARCH_LOOPBACK_PORT=3101
+XREAD_SERP_LOOPBACK_PORT=3201
+SERPER_SEARCH_API_KEY=
+BRAVE_SEARCH_API_KEY=
+LOCAL_PROXY_URLS=