fix(nginxproxymanager): restore NPM nginx.conf after OpenResty rebuild (#14396)

When OpenResty is rebuilt via 'make install', it overwrites
/usr/local/openresty/nginx/conf/nginx.conf with the stock OpenResty
default config, dropping all NPM-specific include directives. This
causes port 81 to stop listening and conf.d configs to be ignored.

After the build, restore the NPM nginx.conf from the deployed source,
re-apply daemon/include-path patches, then apply user/pid fixes.

ct/nginxproxymanager.sh

@@ -92,6 +92,11 @@ ExecStart=/usr/local/openresty/nginx/sbin/nginx -g 'daemon off;'
 [Install]
 WantedBy=multi-user.target
 EOF
+    if [ -f /opt/nginxproxymanager/docker/rootfs/etc/nginx/nginx.conf ]; then
+      cp /opt/nginxproxymanager/docker/rootfs/etc/nginx/nginx.conf /usr/local/openresty/nginx/conf/nginx.conf
+      sed -i 's+^daemon+#daemon+g' /usr/local/openresty/nginx/conf/nginx.conf
+      sed -i 's+include conf.d+include /etc/nginx/conf.d+g' /usr/local/openresty/nginx/conf/nginx.conf
+    fi
     sed -i 's/user npm/user root/g; s/^pid/#pid/g' /usr/local/openresty/nginx/conf/nginx.conf
     systemctl daemon-reload
     systemctl unmask openresty 2>/dev/null || true