Add metrics

server/metrics.ts

@@ -0,0 +1,25 @@
+import { Counter } from 'prom-client';
+
+export const imageUploaded = new Counter({
+  name: 'image_uploaded_total',
+  help: 'Images uploaded',
+  labelNames: ['hunt']
+});
+
+export const answerFinalized = new Counter({
+  name: 'answer_finalized_total',
+  help: 'Answer got finalized',
+  labelNames: ['hunt']
+});
+
+export const answerChanged = new Counter({
+  name: 'answer_changed_total',
+  help: 'Answer got uploaded or changed',
+  labelNames: ['hunt']
+});
+
+export const logins = new Counter({
+  name: 'login_total',
+  help: 'Logins',
+  labelNames: ['success']
+});