Added CI check to catch build errors

.gitlab-ci.yml

@@ -46,6 +46,7 @@ test_front:
 
   script:
     - yarn install
+    - yarn run build | tee /dev/stderr | (! grep -i 'ERROR in')
     - yarn run unit
   cache:
     key: "$CI_PROJECT_ID__front_dependencies"
@@ -70,7 +71,9 @@ build_front:
     - yarn install
     - yarn run i18n-extract
     - yarn run i18n-compile
-    - yarn run build
+    # this is to ensure we don't have any errors in the output,
+    # cf https://code.eliotberriot.com/funkwhale/funkwhale/issues/169
+    - yarn run build | tee /dev/stderr | (! grep -i 'ERROR in')
   cache:
     key: "$CI_PROJECT_ID__front_dependencies"
     paths: