Fix #124 (dirty hack):

This commit is a dirty hack to fix issue with ARM64 Prosody AppImage.
The fixed appimagebuild tool is not released by the dev team.
So i patch it in my build script. This is not a good solution, but it
works, and let me go forward.

server/lib/settings.ts

@@ -62,7 +62,7 @@ async function initSettings (options: RegisterServerOptions): Promise<void> {
     descriptionHTML: loc('diagnostic')
   })
 
-  if (process.arch !== 'x64' && process.arch !== 'x86_64') {
+  if (process.arch !== 'x64' && process.arch !== 'x86_64' && process.arch !== 'arm64') {
     registerSetting({
       name: 'prosody-arch-warning',
       type: 'html',