make migrations on the first run of the inventory app

production.sh

@@ -3,6 +3,7 @@ if [ -f ./.second_run ]; then
     python manage.py makemigrations
     python manage.py migrate
 else
+    python manage.py makemigrations inventory
     python manage.py makemigrations
     python manage.py migrate
     python manage.py loaddata inventory

run.sh

@@ -4,6 +4,7 @@ if [ -f ./.second_run ]; then
     python manage.py makemigrations
     python manage.py migrate
 else
+    python manage.py makemigrations inventory
     python manage.py makemigrations
     python manage.py migrate
     python manage.py loaddata inventory