chore: add dockerignore for scripts, local artifacts, and env files

The image previously inherited everything from a `COPY . .`, including
.env (secrets), local notes.db copies, and admin scripts that should
not run in prod containers.

jetstream.ts

@@ -59,7 +59,7 @@ const fireWebhooks = async (
   await dispatchAll(webhooks, payload, `${verb} ${did}`);
 };
 
-const BULK_CREATE_DEBOUNCE_MS = 15000;
+const BULK_CREATE_DEBOUNCE_MS = 500;
 
 type BulkBuffer = {
   records: Record<string, unknown>[];