Change how gunicorn runs this.

matlab.service

@@ -6,7 +6,7 @@ Wants=network-online.target
 [Service]
 User=matlab-user
 Type=simple
-ExecStart=/usr/local/bin/gunicorn --bind unix:/tmp/matlabhub.sock matlabhub.wsgi:application
+ExecStart=/usr/local/bin/gunicorn --bind unix:/tmp/matlabhub.sock matlabhub.app:app
 ExecStop=/bin/kill -s STOP $MAINPID
 ExecReload=/bin/kill -s HUP $MAINPID
 TimeoutSec=0

matlabhub/wsgi.py

@@ -1,3 +0,0 @@
-import os
-import sys
-from matlabhub.app import app as application

setup.py

@@ -19,7 +19,7 @@ setuptools.setup(
         'Operating System :: OS Independent',
     ],
     python_requires='>=3.8',
-    install_requires=['matlab-proxy', 'flask'],
+    install_requires=['matlab-proxy', 'flask', 'gunicorn', 'pyyaml'],
     entry_points={'console_scripts': ['matlabhub=matlabhub:main'], },
     package_data={'': ['templates/*', 'config.yml']},
     include_package_data=True,