修改docker部署方式

.env.example

@@ -2,7 +2,7 @@ PUBLIC_ORIGIN=https://blog.example.com
 SITE_ADDRESS=blog.example.com
 SITE_TITLE=ChuBlog
 ADMIN_USERNAME=admin
-# Generate with chublog-api hash-password; keep single quotes around the hash.
+# Generate via the temporary API container in docs/deployment.md; keep single quotes around the hash.
 ADMIN_PASSWORD_HASH='$argon2id$REPLACE_WITH_GENERATED_HASH'
 ALLOW_REGISTRATION=true
 CHUSQL_ROOT_PASSWORD=replace-with-random-root-password-at-least-16-characters
@@ -13,3 +13,8 @@ HTTPS_PORT=443
 
 # Tencent Cloud VPC image mirror. Outside Tencent Cloud, clear this value.
 REGISTRY_PREFIX=mirror.ccs.tencentyun.com/library/
+# Tencent VPC package mirrors. Rust and GHC arrive through the image registry above.
+DEBIAN_MIRROR=mirrors.tencentyun.com
+NPM_REGISTRY=https://mirrors.tencentyun.com/npm/
+# Tencent does not list a Cargo mirror; use RsProxy externally. Empty selects crates.io.
+CARGO_MIRROR_INDEX=sparse+https://rsproxy.cn/index/