Add drone support

Signed-off-by: Roeland Jago Douma <roeland@famdouma.nl>

.drone.yml

@@ -42,6 +42,13 @@ pipeline:
     when:
       matrix:
         TESTS: vue-build-accessibility
+  vue-build-backupcodes:
+    image: node
+    commands:
+      - ./build/vue-builds.sh ./apps/twofactor_backupcodes/js/settings.js
+    when:
+      matrix:
+        TESTS: vue-build-backupscodes
   checkers:
     image: nextcloudci/php7.0:php7.0-19
     commands:
@@ -756,6 +763,7 @@ matrix:
     - TESTS: vue-build-updatenotification
     - TESTS: vue-build-oauth2
     - TESTS: vue-build-accessibility
+    - TESTS: vue-build-backupcodes
     - TESTS: nodb-codecov
       ENABLE_REDIS: true
     - TESTS: db-codecov