Golang upgrade

• Upgrade golang to 1.21.3
• Add gosec scanning

Add entrypoint

Merge pull request #7 from SalesLoft/SL-39001-gorollout

entrypoint

Dockerfile salesloft/gorollout added

Merge pull request #6 from SalesLoft/dockerfile-support

added dockerfile and build instructions

Security Vulnerabilities

Upgrade to go 1.18 and upgrade vulnerable packages

Randomize percentage control

Added the ability to control whether or not to randomize percentage calculations between feature flags with different names.

Initial release

Merge pull request #2 from SalesLoft/github-actions

codecov action