fix build.yml

.github/workflows/build.yml

@@ -8,6 +8,10 @@ jobs:
     name: Build
     runs-on: ubuntu-latest
     steps:
+    - uses: actions/checkout@v2
+    - uses: actions/setup-node@v1
+      with:
+        node_version: '13.x'
     - run: |
         cd ui
         yarn
@@ -17,10 +21,6 @@ jobs:
       with:
         name: .uibuild
         path: .uibuild
-    - uses: actions/checkout@v2
-    - uses: actions/setup-node@v1
-      with:
-        node_version: '13.x'
     - run: |
         yarn
         yarn build:production