Update devtools-golang-v1beta1.md (#2731)

Author: ChrisNor81

docs/images/devtools-golang-v1beta1.md

@@ -76,7 +76,7 @@ services:
       - "50051:50051"
     networks:
       - default
-    working_dir: /srv/workspace
+    working_dir: /srv/workspace/<root-folder-app>
     command: "golang-run"
 networks:
   default: