fix(readme): Correct DATABASE_CONFIG example formatting in README and add local settings configuration file

readme.md

@@ -102,17 +102,14 @@ Qenv loads variables in this order (first found wins):
 Store and retrieve complex configuration objects:
 
 ```typescript
-// In env.yml
-const config = {
-  database: {
-    host: 'localhost',
-    port: 5432,
-    options: {
-      ssl: true,
+# In env.yml
+DATABASE_CONFIG:
+  database:
+    host: localhost
+    port: 5432
+    options:
+      ssl: true
       poolSize: 10
-    }
-  }
-};
 
 // Qenv automatically handles base64 encoding
 const dbConfig = await qenv.getEnvVarOnDemandAsObject('DATABASE_CONFIG');