Add dashboard to build

reminder-dashboard/public/static/js/reporter.js

@@ -0,0 +1,16 @@
+const REPORTER_ID = crypto.randomUUID();
+
+window.addEventListener("error", async (ev) => {
+    await fetch("/report", {
+        method: "POST",
+        body: JSON.stringify({
+            reporterId: REPORTER_ID,
+            url: window.location.href,
+            relativeTimestamp: ev.timeStamp,
+            errorMessage: ev.message,
+            errorLine: ev.lineno,
+            errorFile: ev.filename,
+            errorType: ev.type,
+        }),
+    });
+});