Fix the Dockerfile in case of Kaniko build (#15510)
Fix the Dockerfile in case of Kaniko build (#15510)

Kaniko does not support looking up binaries from $PATH, so we
specify the full path to the bash binary.

Co-authored-by: kaiyou <34c6fceca75e456f25e7e99531e2425c6c1de443@kaiyou.fr>
masto-donte-com-br/mastodon,gol-cha/mastodon,ikuradon/mastodon,maa123/mastodon,tootsuite/mastodon,MitarashiDango/mastodon,MitarashiDango/mastodon,Ryanaka/mastodon,yi0713/mastodon,theoria24/mastodon,primenumber/mastodon,pinfort/mastodon,ikuradon/mastodon,tootsuite/mastodon,glitch-soc/mastodon,lynlynlynx/mastodon,ikuradon/mastodon,lindwurm/mastodon,lindwurm/mastodon,yukimochi/mastodon,primenumber/mastodon,h3zjp/mastodon,abcang/mastodon,maa123/mastodon,musashino205/mastodon,pinfort/mastodon,musashino205/mastodon,imas/mastodon,ykzts/mastodon,tootsuite/mastodon,imas/mastodon,imas/mastodon,Kirishima21/mastodon,h3zjp/mastodon,glitch-soc/mastodon,masto-donte-com-br/mastodon,gol-cha/mastodon,glitch-soc/mastodon,Nyoho/mastodon,ikuradon/mastodon,gol-cha/mastodon,musashino205/mastodon,koba-lab/mastodon,tootcafe/mastodon,h3zjp/mastodon,ykzts/mastodon,MitarashiDango/mastodon,danhunsaker/mastodon,tootsuite/mastodon,Ryanaka/mastodon,gol-cha/mastodon,Nyoho/mastodon,tootcafe/mastodon,Ryanaka/mastodon,abcang/mastodon,Nyoho/mastodon,tootcafe/mastodon,MitarashiDango/mastodon,lynlynlynx/mastodon,yukimochi/mastodon,pinfort/mastodon,masto-donte-com-br/mastodon,yi0713/mastodon,Ryanaka/mastodon,lynlynlynx/mastodon,ykzts/mastodon,lindwurm/mastodon,cobodo/mastodon,glitch-soc/mastodon,pinfort/mastodon,danhunsaker/mastodon,theoria24/mastodon,abcang/mastodon,ykzts/mastodon,Kirishima21/mastodon,cobodo/mastodon,theoria24/mastodon,masto-donte-com-br/mastodon,tootcafe/mastodon,koba-lab/mastodon,yukimochi/mastodon,im-in-space/mastodon,theoria24/mastodon,im-in-space/mastodon,h3zjp/mastodon,im-in-space/mastodon,yukimochi/mastodon,cobodo/mastodon,danhunsaker/mastodon,abcang/mastodon,Kirishima21/mastodon,koba-lab/mastodon,primenumber/mastodon,maa123/mastodon,yi0713/mastodon,Kirishima21/mastodon,Nyoho/mastodon,koba-lab/mastodon,imas/mastodon,lindwurm/mastodon,im-in-space/mastodon,primenumber/mastodon,danhunsaker/mastodon,lynlynlynx/mastodon,maa123/mastodon,cobodo/mastodon,yi0713/mastodon,musashino205/mastodon