✨ feat: Host a relay on Hetzner (#114)

We are hosting a [MoQ](https://quic.video) relay on a remote (bare
metal) server on Hetzner

With a lot of help from @victorpahuus

packages/moq/common/settings.ts

@@ -0,0 +1,33 @@
+// MediaTrackSettings can represent both audio and video, which means a LOT of possibly undefined properties.
+// This is a fork of the MediaTrackSettings interface with properties required for audio or vidfeo.
+export interface AudioTrackSettings {
+	deviceId: string
+	groupId: string
+
+	autoGainControl: boolean
+	channelCount: number
+	echoCancellation: boolean
+	noiseSuppression: boolean
+	sampleRate: number
+	sampleSize: number
+}
+
+export interface VideoTrackSettings {
+	deviceId: string
+	groupId: string
+
+	aspectRatio: number
+	facingMode: "user" | "environment" | "left" | "right"
+	frameRate: number
+	height: number
+	resizeMode: "none" | "crop-and-scale"
+	width: number
+}
+
+export function isAudioTrackSettings(settings: MediaTrackSettings): settings is AudioTrackSettings {
+	return "sampleRate" in settings
+}
+
+export function isVideoTrackSettings(settings: MediaTrackSettings): settings is VideoTrackSettings {
+	return "width" in settings
+}