serve/docker: allow to customize proxy settings of docker plugin #5658
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What is the purpose of this change?
This patch allows users to adjust the following environment variables on the docker volume plugin:
HTTP_PROXY HTTPS_PROXY NO_PROXY
Most rclone backends are https(s) based and internally dial a provider's http(s) site using the rclone-extended go dialer honoring the environment settings above.
Note that since go 1.16 (see golang/go#40909) the semantics has changed slightly and HTTP_PROXY does not affect httpS connections anymore.
Was the change discussed in an issue or in the forum before?
No
Checklist
@ncw Please review