Add necessary infrastructure for ssh

Author: ateucher

ci/environment.yml

@@ -111,6 +111,7 @@ dependencies:
   - xvec
   - shap
   - xgboost
+  - openssh
   # we could use more platforms but in the hub only linux-64 is relevant
   - pip
   - pip:
@@ -119,5 +120,6 @@ dependencies:
       - jupyter-desktop-server>=0.1.3
       - jupyterlab-open-url-parameter
       - pigz
+      - jupyter-sshd-proxy
 platforms:
   - linux-64