wip: configure region for deps cache

.drone.yml

@@ -32,6 +32,7 @@ steps:
       mount:
         - _build
         - deps
+      region: us-east-1
       restore: true
 
   - name: test
@@ -67,6 +68,7 @@ steps:
         - _build
         - deps
       rebuild: true
+      region: us-east-1
       exit_code: true
 
 services:
@@ -75,7 +77,3 @@ services:
     environment:
       POSTGRES_USER: postgres
       POSTGRES_PASSWORD: postgres
-
-volumes:
-  - name: cache
-    temp: {}