Adding custom EOSC ui

This MR introduces custom EOSC ui for all Notebook instances

cesnet-central/deployments/fullhub.yaml

@@ -131,6 +131,10 @@ singleuser:
     singleuser-webdav-wrapper.sh:
       mode: 0755
       mountPath: /usr/local/bin/jupyterhub-singleuser-webdav-wrapper
+      #NotebookNotary.db_file=':memory:' is used due to issues
+      #notebook notary file was causing in ~/.jupyter in ownCloud mount
+      #
+      #LabApp.custom_css=True allows usage of custom CSS stylesheet
       stringData: |-
         #! /bin/sh
         #
@@ -147,26 +151,46 @@ singleuser:
         exec jupyterhub-singleuser \
           --FileCheckpoints.checkpoint_dir='/home/jovyan/.notebookCheckpoints' \
           --NotebookNotary.db_file=':memory:' \
+          --LabApp.custom_css=True \
           "$@"
-    disable-labnews:
+
+    #Settings in overrides.json must be passed as stringData.
+    #Otherwise JupyterLab will not consider them
+
+    ##Disables news Jupyter notifications
+
+    ##Overrides default Help menu to include EOSC links
+    ##Setting is reusing 'git:open-url' command from Jupyter Git
+    ##extension to open link in browser tab, because 'help:open'
+    ##command opens tab inside Lab and EOSC website does not
+    ##allow itself to be open if embedded in another website
+
+    overrides-settings:
       mode: 0644
       mountPath: /opt/conda/share/jupyter/lab/settings/overrides.json
+      #Using indent filter to create a block string content from override config
       stringData: |-
-        {
-          "@jupyterlab/apputils-extension:notification": {
-            "checkForUpdates": "false",
-            "fetchNews": "false"
-          },
-          "@jupyterlab/application-extension:context-menu": {
-            "contextMenu": [
-              {
-                "command": "filebrowser:share-main",
-                "selector": ".jp-DirListing-item[data-isdir]",
-                "disabled": true
-              }
-            ]
-          }
-        }
+        {% filter indent(10) %}
+        {{ overrides_file_content | to_json }}
+        {% endfilter %}
+
+
+    #All file contents passed as binaryData must be encoded in base64
+    #https://z2jh.jupyter.org/en/latest/resources/reference.html#singleuser-extrafiles
+
+    #Two files below are not included in /home/jovyan/.jupyter because 
+    #that is ownCloud mount path. They are included in jupyter_server 
+    #static path instead, because otherwise Jupyter is not considering
+    # custom CSS
+    eosc-css:
+      mode: 0644
+      mountPath: /opt/conda/lib/python3.11/site-packages/jupyter_server/static/custom/custom.css
+      binaryData: "{{ css_file_content | b64encode }}"
+    eosc-logo:
+      mode: 0644
+      mountPath: /opt/conda/lib/python3.11/site-packages/jupyter_server/static/custom/logo/eosc-ntb-logo.svg
+      binaryData: "{{ logo_file_content | b64encode }}"
+
 
 hub:
   services: