chore: create image with required files

[sbansla]

Fixes

This has been tested locally by creating container out of image with the changes in current PR.

root@3b861089fc6f:/twilio# ls
Gemfile  Gemfile.lock  LICENSE	README.md  Rakefile  lib  pkg  twilio-ruby.gemspec 

Checklist

• I acknowledge that all my contributions will be made under the project's license
• I have made a material change to the repo (functionality, testing, spelling, grammar)
• I have read the Contribution Guidelines and my PR follows them
• I have titled the PR appropriately
• I have updated my branch with the main branch
• I have added tests that prove my fix is effective or that my feature works
• I have added the necessary documentation about the functionality in the appropriate .md file
• I have added inline documentation to the code I modified

If you have questions, please file a support ticket, or create a GitHub Issue in this repository.

[shrutiburman]

Rather than ignoring it here why dont we just copy only what's needed in the Dockerflie ?
Change this

twilio-ruby/Dockerfile

Line 6 in 76aaf8c

COPY . .

to only copy src, tests, etc folder.

[shrutiburman]

Reference in go https://github.com/twilio/twilio-go/blob/f8af549ad7c3f4df8785bab5748b29d7b8cbd9cd/Dockerfile#L6

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud