title: Write to a file within Azure Function failing
body: <p>Currently, I am having my azure function (in python) dynamically write a a plist file to in order for an app to be downloaded through a browser on an IOS device. This works fine locally, but when it is published to Azure I get an internal server error 500 and it fails to write the file when the function is called. This is my code snippet:</p>
  <pre><code>pList = {
          'items': [
              {
                  'assets': [
                      {
                          'kind': 'software-package',
                          'url': ipaUrl
                      },
                      {
                          'kind': 'display-image',
                          'needs-shine': False,
                          'url': imageUrl
                      }
                  ],
                  'metadata': {
                      'bundle-identifier': bundleName,
                      'bundle-version': f'{versionName} ({buildName})',
                      'kind': 'software',
                      'title': appName
                  }
              }
          ]
      }
  with open('list.plist', 'wb') as file:
      plistlib.dump(pList, file)
  </code></pre>
  <p>Any suggestions? I am not sure if functions supports reading / writing to files when deployed so that may be my issue.</p>