show goversion and goos/goarch on admin page

webadmin/admin.ts

@@ -3,6 +3,9 @@
 // From HTML.
 declare let page: HTMLElement
 declare let moxversion: string
+declare let moxgoversion: string
+declare let moxgoos: string
+declare let moxgoarch: string
 
 const login = async (reason: string) => {
 	return new Promise<string>((resolve: (v: string) => void, _) => {
@@ -120,7 +123,9 @@ const footer = dom.div(
 	style({marginTop: '6ex', opacity: 0.75}),
 	link('https://www.xmox.nl', 'mox'),
 	' ',
-	moxversion,
+	moxversion, ' ',
+	moxgoversion, ' ',
+	moxgoos, '/', moxgoarch,
 )
 
 const age = (date: Date, future: boolean, nowSecs: number) => {