使用 S6 Overlay 替换 Supervisord

- 移除 supervisord 和 Python 依赖
- 使用 S6 Overlay v3 作为进程管理器（更轻量）
- 创建 webman 服务配置
- 预计可减少约 10MB 镜像大小

Co-Authored-By: Claude <noreply@anthropic.com>

Author: Tinywan

Dockerfile

@@ -1,13 +1,19 @@
 FROM php:8.4.16-cli-alpine
 
 LABEL Maintainer="ShaoBo Wan (Tinywan) <756684177@qq.com>" \
-    Description="Webman Lightweight container with PHP 8.4.16 based on Alpine Linux."
+    Description="Webman Lightweight container with PHP 8.4.16 based on Alpine Linux with S6 Overlay."
 
 # Use Alibaba Cloud mirror for faster downloads
 RUN sed -i "s/dl-cdn.alpinelinux.org/mirrors.aliyun.com/g" /etc/apk/repositories
 
+# Install S6 Overlay v3
+ADD https://github.com/just-containers/s6-overlay/releases/download/v3.2.0.0/s6-overlay-noarch.tar.xz /tmp
+RUN tar -C / -Jxpf /tmp/s6-overlay-noarch.tar.xz && rm /tmp/s6-overlay-noarch.tar.xz
+ADD https://github.com/just-containers/s6-overlay/releases/download/v3.2.0.0/s6-overlay-x86_64.tar.xz /tmp
+RUN tar -C / -Jxpf /tmp/s6-overlay-x86_64.tar.xz && rm /tmp/s6-overlay-x86_64.tar.xz
+
 # Install runtime dependencies only (build deps will be installed and removed later)
-RUN apk add --no-cache curl ca-certificates tzdata supervisor
+RUN apk add --no-cache curl ca-certificates tzdata
 
 COPY ./extension /tmp/extension
 WORKDIR /tmp/extension
@@ -31,14 +37,20 @@ RUN curl -sS https://getcomposer.org/installer | php \
 # Configure PHP
 COPY config/php.ini /usr/local/etc/php/conf.d/zzz_custom.ini
 
-# Configure supervisord
-COPY config/supervisord.conf /etc/supervisor/conf.d/supervisord.conf
+# Setup S6 Overlay services
+COPY config/s6/ /etc/s6-overlay/
+
+# Make scripts executable
+RUN chmod +x /etc/s6-overlay/cont-init.d/* \
+    && chmod +x /etc/s6-overlay/services/*/run 2>/dev/null || true
 
 # Setup document root
 RUN mkdir -p /app
 
+# Set S6 Overlay as entrypoint
+ENTRYPOINT ["/init"]
 VOLUME /app
 WORKDIR /app
 EXPOSE 8787
 
-CMD ["/usr/bin/supervisord", "-c", "/etc/supervisor/conf.d/supervisord.conf"]
+CMD []

config/s6/services/webman/run

@@ -0,0 +1,5 @@
+#!/bin/sh
+# Webman service - S6 Overlay
+
+cd /app
+exec php start.php start