Simplify migrations and redesign utility scripts.

util/migrate.py

@@ -0,0 +1,21 @@
+#!/usr/bin/env python3
+
+import sys
+from common import _operation
+
+def run_migrate(args):
+    command = 'upgrade'
+
+    if len(args) > 1:
+        command = args[1]
+
+    result = _operation(command,[
+        "cd service",
+        "export FLASK_APP=files/cli:app",
+        f"python3 -m flask db {command}",
+    ])
+
+    sys.exit(result.returncode)
+
+if __name__=='__main__':
+    run_migrate(sys.argv)