:gear: updating drone indents

.drone.yml

 name: frontend_run_tests
 
 steps:
-    # Test the vue frontend
     - name: test-frontend
         image: node
         commands:
             - npm install
             - npm test
         volumes:
-            # Link node_modules cache from host filesystem into container at the expected location
             - name: frontend_node_cache
-            path: /drone/src/frontend/node_modules
+                path: /drone/src/frontend/node_modules
 
 volumes:
     - name: frontend_node_cache