5.使用 Cloudflare DNS 的 Caddy 2.x

对应的官方页面地址

Dockerfile（Caddy 构建器）：

FROM caddy:builder AS builder
RUN xcaddy build --with github.com/caddy-dns/cloudflare

FROM caddy:latest
COPY --from=builder /usr/bin/caddy /usr/bin/caddy

构建命令：

docker build -t [YOUR-NAME]/caddycfdns .

Caddyfile（作为反向代理）：

https://[YOUR-DOMAIN]:443 {

  tls {
        dns cloudflare [API-KEY]
  }

#  encode gzip

#  header / {
#       # 启用 HTTP Strict Transport Security (HSTS)
#       Strict-Transport-Security "max-age=31536000;"
#       # 启用 cross-site filter (XSS) 并告诉浏览器阻止检测到的攻击
#       X-XSS-Protection "0"
#       # 禁止在框架内呈现网站 (clickjacking protection)
#       X-Frame-Options "DENY"
#       # 阻止搜索引擎编制索引（可选）
#       X-Robots-Tag "noindex, nofollow"
#       # 禁止嗅探 X-Content-Type-Options
#       X-Content-Type-Options "nosniff"
#       # 服务器名称移除
#       -Server
#       # 移除 X-Powered-By 应该不会引起问题，但最好移除 opsec
#       -X-Powered-By
#       # 移除 Last-Modified 因为 etag 具有相同的效果
#       -Last-Modified
#   }
#  # 代理到 Rocket
#  reverse_proxy vaultwarden:80 {
#       # 将真正的远程 IP 发送给 Rocket，以便 vaultwarden 可以将其
#       # 放入日志，以便 fail2ban 可以禁止正确的 IP。
#       header_up X-Real-IP {remote_host}
#  }

#  其余配置，请参阅 ”代理示例“ 部分
}

docker-compose.yml：

version: '3'

services:
  vaultwarden:
    image: vaultwarden/server
    restart: always
    volumes:
      - $PWD/vw-data:/data
    environment:
      SIGNUPS_ALLOWED: 'false'   # 设置为 false 以禁用注册
      DOMAIN: 'https://[DOMAIN]'
      SMTP_HOST: '[MAIL-SERVER]'
      SMTP_FROM: '[E-MAIL]'
      SMTP_PORT: '587'
      SMTP_SECURITY: 'starttls'
      SMTP_USERNAME: '[E-MAIL]'
      SMTP_PASSWORD: '[SMTP-PASS]'
#      ADMIN_TOKEN: '[RAND. GENERATE]'
#      YUBICO_CLIENT_ID: '[OPTIONAL]'
#      YUBICO_SECRET_KEY: '[OPTIONAL]'

  caddy:
    image: [YOUR-NAME]/caddycfdns
    restart: always
    volumes:
      - $PWD/Caddyfile:/etc/caddy/Caddyfile
      - caddy_data:/data
      - caddy_config:/config
      - caddy_log:/logs
    ports:
      - [PRIVATE-IP]:443:443
    environment:
      ACME_AGREE: 'true'
      CLOUDFLARE_EMAIL: '[YOUR-EMAIL]'
      CLOUDFLARE_API_TOKEN: '[YOUR-TOKEN]'
      DOMAIN: '[DOMAIN]'

volumes:
  caddy_data:
  caddy_config:
  caddy_log: