OOD deploy time config changes

Closes https://gitlab.rc.uab.edu/rc/hpc-factory/-/issues/214

Closes #248

This MR contains deploy time changes in the OOD config to

1. Accept connections only from OOD proxy
2. Point the shell app to the desired host
3. Fix for shell app timeout issue.
4. Modify account app binding to listen to http-proxy

ansible/roles/ood_config/tasks/main.yml

@@ -9,6 +9,11 @@
     url: https://s3.lts.rc.uab.edu/ood-proxy-file/ood-proxy.conf
     dest: /var/www/ood/apps/sys/shell/app.js 
 
+- name: Shell app configuration env
+  ansible.builtin.template:
+    src: shell_app.env.j2
+    dest: /etc/ood/config/apps/shell/env
+
 - name: Point shell app to login node
   ansible.builtin.replace:
     path: /etc/ood/config/clusters.d/SLURM_CLUSTER.yml