Increase values for inotify

Resolves failed to create fsnotify watcher: too many open files

Closes jupyterhub/mybinder.org-deploy#2727

ansible/plays/k8s-prepare-node.yml

@@ -11,6 +11,14 @@
         name: net.ipv4.ip_forward
         value: '1'
         state: present
+    - ansible.posix.sysctl:
+        name: fs.inotify.max_user_instances
+        value: '1280'
+        state: present
+    - ansible.posix.sysctl:
+        name: fs.inotify.max_user_watches
+        value: '655360'
+        state: present
     - name: Create /orc2_data/containerd directory if it does not exist
       ansible.builtin.file:
         path: /orc2_data/containerd