ci: add env var for gitlab tests

Author: line-o

.github/workflows/node.js.yml

@@ -27,8 +27,9 @@ jobs:
     services:
       # Label used to access the service container
       exist:
-        env: 
-          tuttle_token_tuttle_sample_data: ${{ secrets.TUTTLE_TEST_TOKEN }} 
+        env:
+          tuttle_token_tuttle_sample_data: ${{ secrets.TUTTLE_TEST_TOKEN }}
+          tuttle_token_tuttle_sample_gitlab: ${{ secrets.GITLAB_READ_TOKEN }}
         image: existdb/existdb:${{ matrix.exist-version }}
         ports:
           - 8443:8443