refactor: add CORS_ORIGINS environment variable to render configuration

Author: franklinnolasco7

render.yaml

@@ -16,4 +16,6 @@ services:
       - key: APP_NAME
         value: PH Remittance Rates API
       - key: APP_VERSION
-        value: "1.0.0"
+        value: "1.0.0"
+      - key: CORS_ORIGINS
+        value: '["*"]'