update readme-gitlabci, readme and add if conditions to Sing recipe and...

update readme-gitlabci, readme and add if conditions to Sing recipe and gitlabci in case there are no tags/new releases
1 job for improvements in 1 minute and 58 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Test
passed #179324
build_test_project

00:01:58