Create init.sql

Script checks for "app" schema in Postgres during startup. It will create the schema automatically if it doesn't exist or skip if it does exist.

init.sql

@@ -0,0 +1,6 @@
+DO $$
+BEGIN
+    IF NOT EXISTS (SELECT schema_name FROM information_schema.schemata WHERE schema_name = 'app') THEN
+        CREATE SCHEMA app;
+    END IF;
+END $$;