Rollup merge of #138487 - Kobzol:fix-doc-url-docker, r=marcoieni

Pass `CI_JOB_DOC_URL` to Docker

Fix-up for rust-lang/rust#136911. I always forget to pass new environment variables to Docker images.. 🤦‍♂️

r? `@marcoieni`

try-job: x86_64-fuchsia

Author: fmease