Update ci

.drone.yml

@@ -66,14 +66,6 @@ steps:
     image: boechat107/pgsanity
     commands:
       - pgsanity docker/backend/db/**/*.sql
-  - name: deps
-    image: crystallang/crystal:1.3-alpine
-    volumes:
-      - name: lib
-        path: /drone/src/docker/backend/lib
-    commands:
-      - cd docker/backend
-      - shards install
   - name: restore-cache
     image: drillster/drone-volume-cache
     volumes:
@@ -82,7 +74,18 @@ steps:
     settings:
       restore: true
       mount:
+        - ./docker/backend/lib
         - ./docker/backend/docs
+  - name: deps
+    image: crystallang/crystal:1.3-alpine
+    volumes:
+      - name: lib
+        path: /drone/src/docker/backend/lib
+    commands:
+      - cd docker/backend
+      - shards install
+    depends_on:
+      - restore-cache
   - name: docs
     image: crystallang/crystal:1.3-alpine
     volumes:
@@ -107,6 +110,7 @@ steps:
       mount:
         - ./docker/backend/docs
     depends_on:
+      - deps
       - docs
   - name: build
     image: tmaier/docker-compose