grafana/public/app/plugins/externalPlugins/example/_plugin.json

{
  "pluginType": "externalPlugin",
  "settings": {
    "routes": [
      {
        "path": "/example/static/*",
        "method": "*",
        "req_signed_in": false,
        "req_grafana_admin": false,
        "req_role": "Admin",
        "url": "http://localhost:5000/static"
      },
      {
        "path": "/example/api/*",
        "method": "*",
        "req_signed_in": true,
        "req_grafana_admin": false,
        "req_role": "Admin",
        "url": "http://localhost:5000/api"
      }
    ],
    "css": [
      {
        "href": "/example/static/css/example.css"
      }
    ],
    "js": [
      {
        "src": "/example/static/js/app.js"
      }
    ],
    "menu_items": [
      {
        "text": "Example Plugin",
        "icon": "fa fa-fw fa-smile-o",
        "href": "/example/servers",
        "adminOnly": false,
      }
    ]
  }

}