Try build and migrate before server run

manifests/runserver.pp

 # Starts the django server in a pipenv, if not already running
 class tracingcarbon::runserver () {
   exec { 'Run django' :
-    command => 'yarn build && pipenv run python3 manage.py runserver &',
+    command => 'npm run build && pipenv run python3 manage.py migrate && pipenv run python3 manage.py runserver &',
     path    => [ '/home/mange61/.local/bin', '/usr/bin', '/bin' ],
     cwd     => '/home/mange61/tracing-carbon',
     user    => 'mange61',