新增说明文件；新增Docker、Redis、Tomcat示例

examples/redis.service

@@ -0,0 +1,15 @@
+[Unit]
+Description=Redis Server
+Documentation=https://redis.io
+After=network-online.target firewalld.service
+Wants=network-online.target
+
+[Service]
+Type=forking
+ExecStart=/opt/redis/bin/redis-server /opt/redis/redis.conf
+ExecReload=/opt/redis/bin/redis-server -s reload
+ExecStop=/opt/redis/bin/redis-server -s stop
+Restart=always
+
+[Install]
+WantedBy=multi-user.target