feat: build standalone images

[lburgazzoli]

This trigger standalone image when:

• a PR is merged and the main branch build successfully
• when the publish-standalone-release workflow is triggered (it is not possible to add it to the release action of the backedn because the action is triggered automatically when a release is created but for standalone we must set the related UI tag/version)

[lburgazzoli]

@Delawen can you grant me the permission to define secrets ? I need to set the token to publish to quay

[codecov]

Codecov Report

Merging #809 (23db375) into main (50a2f7e) will decrease coverage by 0.07%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##               main     #809      +/-   ##
============================================
- Coverage     79.48%   79.41%   -0.07%     
  Complexity      167      167              
============================================
  Files            57       57              
  Lines          3027     3027              
  Branches        536      536              
============================================
- Hits           2406     2404       -2     
- Misses          402      404       +2     
  Partials        219      219              

see 1 file with indirect coverage changes

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
2.1% Duplication