[spindle/test] move to workspace folder

.tangled/workflows/build_backend.yaml

···
     - nodejs
 
 steps:
-  - name: "Get directory layout"
-    command: "ls -alh"
-
   - name: "Move to backend folder"
-    command: "cd backend"
+    command: "cd /tangled/workspace/backend"
 
   - name: "Install dependencies"
-    command: "npm install"
+    command: "npm install backend/package.json"
     environment:
       NODE_ENV: "development"
       CI: true

.tangled/workflows/build_frontend.yaml

···
     - nodejs
 
 steps:
-  - name: "Get directory layout"
-    command: "ls -alh"
-
   - name: "Move to frontend folder"
-    command: "cd frontend"
+    command: "cd /tangled/workspace/frontend"
 
   - name: "Install dependencies"
-    command: "npm install"
+    command: "npm install frontend/package.json"
     environment:
       NODE_ENV: "development"
       CI: true

.tangled/workflows/build_lexicons.yaml

···
     - nodejs
 
 steps:
-  - name: "Get directory layout"
-    command: "ls -alh"
-
   - name: "Move to lexicons folder"
-    command: "cd lexicons"
+    command: "cd /tangled/workspace/lexicons"
 
   - name: "Install dependencies"
-    command: "npm install"
+    command: "npm install lexicons/package.json"
     environment:
       NODE_ENV: "development"
       CI: true