make domain configurable via config.json

priv/frontend/config.json

@@ -0,0 +1,3 @@
+{
+  "domain": "https://elstatus.stayathomeserver.club"
+}

priv/frontend/src/components/App.js

@@ -5,9 +5,7 @@ import Service from './Service.js'
 import ServicePlaceholder from './ServicePlaceholder.js'
 import OP from '../ws/op.js'
 import { log } from '../util.js'
-
-const DOMAIN = 'https://elstatus.stayathomeserver.club'
-// const ENDPOINT = 'http://localhost:8069/api/status'
+import { domain as DOMAIN } from '../config.json'
 
 export default class App extends Component {
   websocket = null;

priv/frontend/src/config.json

@@ -0,0 +1 @@
+../config.json