Add Health Check Path

app/routes/healthz.ts

@@ -0,0 +1,17 @@
+import { LoaderFunction } from "remix";
+import { db } from "~/utils/db.server";
+
+export const loader: LoaderFunction = async () => {
+  try {
+    const res = await db.$queryRaw`SELECT 1+1 as val;`;
+    const val = (res as { val: 2 }[])[0].val;
+    if (val !== 2) {
+      // eslint-disable-next-line @typescript-eslint/restrict-template-expressions
+      throw new Error(`val was: ${val}`);
+    }
+    return new Response(null, { status: 204 });
+  } catch (e) {
+    console.error((e as Error).message);
+    return new Response(null, { status: 500 });
+  }
+};