refactor: 迁移根目录 docker/ 到 source/docker/，更新所有路径引用

- 将 docker/{nginx.conf,run.sh,zz-phprun.ini,zz-phpfpm.conf} 移动到 source/docker/
- 更新所有 Dockerfile 中 /var/www/html/docker/ -> /var/www/html/source/docker/
- 更新 stack.json managed_files 路径前缀
- 重组 stack 模式目录结构 docker/ -> source/docker/
- 更新 source/README.md 目录描述
- 更新 AdminUpdateServiceBase.php 可选文件前缀

source/docker/nginx.conf

@@ -0,0 +1,30 @@
+
+server {
+    listen 8000 default_server;
+    listen [::]:8000 default_server;
+
+    root /var/www/html/public;
+    index index.php index.html index.htm;
+
+    server_name _;
+
+    # 上传大小不限制
+    client_max_body_size 8192m;
+
+    # 运行时长不限制
+    fastcgi_read_timeout 60000;
+
+    location / {
+        if (!-e $request_filename) {
+            rewrite ^(.*)$ /index.php?s=$1 last; break;
+        }
+
+    }
+
+    location ~ \.php$ {
+        include fastcgi_params;
+        fastcgi_pass 127.0.0.1:9000;
+        fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
+        fastcgi_param PATH_INFO $fastcgi_path_info;
+    }
+}