feat: signal server tag

server/src/routes/health.ts

@@ -1,7 +1,7 @@
 import { Router } from 'express';
 import { randomUUID } from 'crypto';
 import { getAllPublicServers } from '../cqrs';
-import { getReleaseManifestUrl } from '../config/variables';
+import { getReleaseManifestUrl, getServerTag } from '../config/variables';
 import { SERVER_BUILD_VERSION } from '../generated/build-version';
 import { connectedUsers } from '../websocket/state';
 
@@ -27,7 +27,8 @@ router.get('/health', async (_req, res) => {
     connectedUsers: connectedUsers.size,
     serverInstanceId: SERVER_INSTANCE_ID,
     serverVersion: getServerProjectVersion(),
-    releaseManifestUrl: getReleaseManifestUrl()
+    releaseManifestUrl: getReleaseManifestUrl(),
+    serverTag: getServerTag()
   });
 });