number of concurrent connections atmoz:sftp solution supports

--------------------MESSAGE FROM ADMIN, DELETE BEFORE SUBMITTING----------------------

Sorry to hear you had a bad experience with one of the templates :worried: But, in case you're just asking a question, we're happy to help. You can also check if the question might already have been asked here https://github.com/Azure/azure-quickstart-templates/issues?utf8=%E2%9C%93&q=is%3Aissue

We've created an outline of recommended sections to fill out that will help make this Pull Request awesome!

--------------------MESSAGE FROM ADMIN, DELETE BEFORE SUBMITTING----------------------

201-aci-sftp-files(https://github.com/Azure/azure-quickstart-templates/tree/master/201-aci-sftp-files)

### Issue Details
Wondering howmany concurrent connections does this SFTP container solution support
https://github.com/Azure/azure-quickstart-templates/tree/master/201-aci-sftp-files

### Repro steps (*if necessary, delete otherwise*)
1. NA, this is a question
2.
3.
4.
5.

The issue points to the 201-aci-sftp-files template and asks how many concurrent connections the atmoz:sftp container supports, but names no file or test. Start by reviewing that template and the referenced container configuration, then document a verified connection limit and the conditions or constraints that determine it.

Written by the indexing model from the issue text.