chore: 添加设计资料和示例工程

sample/server/etc/sample.service

@@ -0,0 +1,16 @@
+[Unit]
+Description=Sample Service
+ 
+[Service]
+Type=simple
+Restart=always
+RestartSec=5s
+EnvironmentFile=/data/app/etc/sample.env
+ExecStart=/data/app/sample
+WorkingDirectory=/data/app/
+StandardOutput=file:/data/app/logs/sample.log
+StandardError=file:/data/app/logs/sample.error.log
+
+ 
+[Install]
+WantedBy=multi-user.target