add: error handling to SDK (#240)

* improve error handling and add new `errorHandler` to sdk init function.

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Co-authored-by: Matthias Nannt <mail@matthiasnannt.com>

.devcontainer/docker-compose.yml

@@ -37,5 +37,16 @@ services:
     # Add "forwardPorts": ["5432"] to **devcontainer.json** to forward PostgreSQL locally.
     # (Adding the "ports" property to this file will not forward from a Codespace.)
 
+  mailhog:
+    image: mailhog/mailhog
+    network_mode: service:app
+    logging:
+      driver: "none" # disable saving logs
+        #    ports:
+      #    - 8025:8025 # web ui
+      # 1025:1025 # smtp server
+
+
+
 volumes:
   postgres-data: null