添加 Caddy Dockerfile，构建自定义 Caddy 镜像

caddy/Containerfile

@@ -1,4 +1,4 @@
-FROM caddy:2-builder AS builder
+FROM docker.io/library/caddy:2-builder AS builder
 
 RUN xcaddy build \
     --with github.com/caddyserver/nginx-adapter \
@@ -11,8 +11,8 @@ RUN xcaddy build \
     --with github.com/mholt/caddy-l4 \
     --with github.com/aksdb/caddy-cgi/v2
 
-FROM caddy:latest
+FROM docker.io/library/caddy:latest
 
-RUN apk update && apk add --no-cache git git-daemon
+RUN apk update && apk add --no-cache git git-daemon cgit python3
 
 COPY --from=builder /usr/bin/caddy /usr/bin/caddy