Use disable_external in site test

.gitlab-ci.yml

@@ -41,7 +41,7 @@ build.live:
 test:
   stage: test_stage
   script:
-    - singularity run 'docker://18fgsa/html-proofer:gitlab-ci' htmlproofer ./public --empty_alt_ignore --url-ignore "https://twitter.com/strand_lab,http://strandlab.dev.s3-website.us-east-2.amazonaws.com/*"
+    - singularity run 'docker://18fgsa/html-proofer:gitlab-ci' htmlproofer ./public --empty_alt_ignore --diable_external true
 
 deploy.dev:
   stage: deploy_stage