101-vm-linux-Jupyterhub won't work at all

[101-vm-linux-Jupyterhub](https://github.com/Azure/azure-quickstart-templates/tree/master/101-vm-linux-Jupyterhub)

### Issue Details

It's broken with the following broken script. Have you tested it even once before release?

https://github.com/Azure/azure-quickstart-templates/blob/720b93320688f9896053e1be2bfa5caf9220115b/101-vm-linux-Jupyterhub/scripts/install.sh

### Repro steps

1. Click Deploy to Azure
2. Deploy
3. Nothing coming up on http://server-ip-address
4. Find the following output from VM's custom script extension on Azure Portal
```
Enable succeeded: [stdout] [stderr] install.sh: line 1: !/bin/bash: No such file or directory install.sh: line 2: bootstrap.py: command not found
```

Open 101-vm-linux-Jupyterhub/scripts/install.sh and compare it with the reported custom script extension output. Deploy the template and check the VM logs, then verify that the JupyterHub endpoint responds at the server IP after the installation completes.

Written by the indexing model from the issue text.