add gitpod.yml

.gitpod.Dockerfile

+FROM gitpod/workspace-full:latest
+
+USER gitpod
\ No newline at end of file

.gitpod.yml

+image:
+  file: .gitpod.Dockerfile
+
+ports:
+  - port: 3000
+    onOpen: open-preview
+tasks:
+  - command: echo Terminal1