ASH Running as non-root user

[rafaelpereyra]

Issue #, if available:
N/A
Description of changes:
Rebase from main with changes in #79 .

In this PR we made the following changes:

• Run ash as non-root user to comply with the security scans (ASH on ASH) and best practices.
• Create a CI version of the docker file that still runs as root to comply with the different requirements from building platforms where UID/GID cannot be modified and there are additional agents installed at runtime that requires elevated privileges.

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[climbertjh2]

Requesting one minor change.

[climbertjh2]

Changes look good to me.

[rafaelpereyra]

Check 777 permission on /src and /out folders

[climbertjh2]

This is better than where we started - so I'm good with merging.

[rafaelpereyra]

Includes changes from #79

[awsmadi]

looks great!

[climbertjh2]

This looks good to me.

I understand the addition of --target to the command-line options, since it is similar to the docker build command-line option of --target. However, in the context of the ash command-line, I think it might cause some confusion.

Also, in the command-line help, it says image to build - it probably should say image to run/build.