ci: return .dockerignore without .git

Summary

• ci: return .dockerignore without .git

When ignoring the .git directory, the image build in the dependent pipeline breaks, since git describe is executed not only in picodata, but also in the tarantool-sys, tarantool-sys/third_party/luajit submodules

---

• Close #...
• Cherry-pick to: none
• Docs follow-up: not necessary / new issue

requested review from @d.rodionov

assigned to @v.shunkov

changed the description

added 1 commit

• e1439f52 - ci: return .dockerignore without .git

Compare with previous version

approved this merge request

added 4 commits

• e1439f52...daffd6db - 3 commits from branch master
• 86f64967 - ci: return .dockerignore without .git

Compare with previous version

merged