Too many 504 which make the tests unstable

[kptdobe]

Follow up of adobe/helix-publish#640.

I have studied the latest tests executions and there are many failing tests due to pages returning 504. Nothing related to the tests themselves, just making a get to a simple helix-pages page fires an error.

My goal here is to collect samples and errors.

[kptdobe]

• https://app.circleci.com/pipelines/github/adobe/helix-pages/2108/workflows/2f56d05f-2ef8-49c4-85e4-c7eddcd4f079/jobs/8252/tests

  • https://experience.adobe.com/#/@helix/custom-apps/325368-TraceDebug/#a9d99685-9ff8-0e97-aa00-c2d468cc62e0 -> Google User Rate Limit Exceeded. Opened https://github.com/adobe/helix-gdocs2md/issues/362 to track.
  • https://experience.adobe.com/#/@helix/custom-apps/325368-TraceDebug/#2cd1403a-da3e-4d51-a957-b8b2ba540da9 -> Gateway timeout of 20000 milliseconds exceeded for https://adobeioruntime.net/api/v1/web/helix-pages/helix-services/content-proxy@v2?owner=adobe&repo=pages&path=%2Fihearttech%2Fen%2Fheader.md&ref=515fcb06cb2e0c583ab07a59bfc0f1364c6c23ce

• https://app.circleci.com/pipelines/github/adobe/helix-pages/2114/workflows/cc793e45-05df-459a-a2b4-ee5aed520bb1/jobs/8308 -> https://experience.adobe.com/#/@helix/custom-apps/325368-TraceDebug/#2b1772ff4e27405c9772ff4e27705c93 -> Gateway timeout of 1000 milliseconds exceeded for https://raw.githubusercontent.com/adobe/helix-purge/2d58a0461e288a90cd685998db533b92e331945e/default-meta-image.jpg