https://docs.github.com/en/authentication/managing-commit-signature-verification/telling-git-about-your-signing-key https://confluence.atlassian.com/sourcetreekb/setup-gpg-to-sign-commits-within-sourcetree-765397791.html

git-gpg-singing.sh

# Option 1 (local repo-wide configuration):
# https://confluence.atlassian.com/sourcetreekb/setup-gpg-to-sign-commits-within-sourcetree-765397791.html

# Option 2 (global system-wide configuration):
# https://docs.github.com/en/authentication/managing-commit-signature-verification/telling-git-about-your-signing-key

# list gpg signing keys
gpg --list-secret-keys --keyid-format=long

# global add keyid of gpg-key
git config --global user.signingkey <keyid>

# global set commit signing to true
git config --global commit.gpgsign true