put "npm install" before build into Makefile

.gitlab-ci.yml

@@ -49,7 +49,6 @@ build:frontend:
   image: $NODE_IMAGE
   script:
     - node --version && npm --version
-    - cd ui && npm i && cd ..
     - make frontend
   artifacts:
     paths:

Makefile

@@ -11,10 +11,10 @@ backend: target/release/upend
 target/release/upend:
 	cargo build --release
 
-frontend: ui/node_modules ui/dist/index.html
+frontend: ui/dist/index.html
 
 ui/dist/index.html:
-	cd ui && npm run build
+	cd ui && npm install && npm run build
 
 lint: backend_lint frontend_lint