操作流程：
mv weather_exporter_jingtian /usr/local/bin/
chmod +x /usr/local/bin/weather_exporter_jingtian
# 启动脚本
vim /usr/lib/systemd/system/weather_exporter.service
[Unit]
Description=weather_exporter
Documentation=https://prometheus.io/
After=network.target
[Service]
ExecStart=/usr/local/bin/weather_exporter_jingtian --port 7001
ExecReload=/bin/kill -HUP $MAINPID
TimeoutStopSec=20s
Restart=always
[Install]
WantedBy=multi-user.target
systemctl daemon-reload
systemctl start weather_exporter.service
