add locale model

api/models/locale.py

@@ -0,0 +1,13 @@
+from api import db
+
+class Locale(db.Model):
+  __tablename__ = 'locales'
+
+  id = db.Column(db.Integer, primary_key=True)
+  value = db.Column(db.String(5), nullable=False)
+
+  def to_json(self):
+    return {
+      "id": self.id
+      "value": self.value
+    }