Add server init script

- Taken (mostly) from https://github.com/inventree/InvenTree/pull/1949

tasks.py

@@ -156,7 +156,7 @@ def migrate(c):
     print("========================================")
 
     manage(c, "makemigrations")
-    manage(c, "migrate")
+    manage(c, "migrate --noinput")
     manage(c, "migrate --run-syncdb")
     manage(c, "check")