Adding a mechanism to postpone DB access before the DB is ready.

src/lib/async-wait.ts

@@ -0,0 +1,11 @@
+// See https://stackoverflow.com/questions/22125865/how-to-wait-until-a-predicate-condition-becomes-true-in-javascript
+
+export const sleep = (ms: number) => {
+  return new Promise((resolve) => setTimeout(resolve, ms));
+};
+
+export const until = async (fn: any, ms: number = 0) => {
+  while (!fn()) {
+    await sleep(ms);
+  }
+};