Edit example env file to use postgrs container IP

Author: UTXOnly

README.md

@@ -34,7 +34,7 @@ POSTGRES_DB=nostr
 POSTGRES_USER=nostr
 POSTGRES_PASSWORD=nostr
 POSTGRES_PORT=5432
-POSTGRES_HOST=localhost
+POSTGRES_HOST=172.28.0.4
 DD_ENV=<DATADOG_ENV_TAG>
 DD_API_KEY=<YOUR_DATADOG_API_KEY>
 DOMAIN_NAME=<YOUR_DOMAIN_NAME>