Azure.Sdk.Tools.TestProxy_1.0.0-dev.20220208.2

Custom port for test-proxy (#2664)

* readme docs

* support specific port to be used

* add docs for port

* honor env var for ports

* Update tools/test-proxy/Azure.Sdk.Tools.TestProxy/README.md

* readme

* type

* revert

* revert

* use urls

* remove using

* no default

* Apply suggestions from code review

Co-authored-by: Scott Beddall <45376673+scbedd@users.noreply.github.com>

* updates

* original

Co-authored-by: Scott Beddall <45376673+scbedd@users.noreply.github.com>