Bootstrap copied BFF and local accounts with public Sendico contracts (#34)

backend/contracts/sendico/api/parameters/states.yaml

@@ -0,0 +1,10 @@
+components:
+  parameters:
+    States:
+      name: states
+      in: query
+      required: false
+      description: |
+        Multi-state filter. Provide a comma-separated list with same accepted values as `state`.
+      schema:
+        type: string