Explicitly point VSCode to the workspace

.devcontainer/docker-compose.yml

@@ -25,6 +25,12 @@ services:
 
     # Uncomment the next line to use a non-root user for all processes.
     # user: vscode
+    volumes:
+      # Mounts the project folder to '/workspace'. The target path inside the container
+      # should match what your application expects. In this case, the compose file is
+      # in a sub-folder, so you will mount '..'. You would then reference this path as the
+      # 'workspaceFolder' in '.devcontainer/devcontainer.json' so VS Code starts here.
+      - ..:/workspace:cached
 
   db:
     image: kartoza/postgis:latest