test websocat by bypassing jupyter-server-proxy

.github/workflows/test.yaml

@@ -70,6 +70,21 @@ jobs:
           }
           echo "::endgroup::"
 
+          echo "::group::Installing websocat in container"
+          docker exec --user root $container_id bash -c '
+            wget -q https://github.com/vi/websocat/releases/download/v1.12.0/websocat.x86_64-unknown-linux-musl \
+              -O /usr/local/bin/websocat
+            chmod +x /usr/local/bin/websocat
+            websocat --help=long
+          '
+          echo "::endgroup::"
+
+          echo "::group::Testing /desktop-websockify/ to return a vncserver typical response from within the container"
+          docker exec $container_id bash -c '
+            websocat -vv --no-async-stdio --binary --one-message --exit-on-eof 'ws://localhost:5901'
+          '
+          echo "::endgroup::"
+
           echo "::group::jupyter_server logs"
           docker logs $container_id
           echo "::endgroup::"

jupyter_remote_desktop_proxy/setup_websockify.py

@@ -67,6 +67,7 @@ def setup_websockify():
         + websockify_args
         + ['--', '/bin/sh', '-c', f'cd {os.getcwd()} && {vnc_command}'],
         'timeout': 30,
+        'port': 5901,
         'new_browser_window': True,
         # We want the launcher entry to point to /desktop/, not to /desktop-websockify/
         # /desktop/ is the user facing URL, while /desktop-websockify/ now *only* serves