Build container image by GitHub Actions (#16973)
Build container image by GitHub Actions (#16973)

* Build container image by GitHub Actions

* Trigger docker build only pushed to main branch

* Tweak tagging imgae

- "edge" is the main branch
- "latest" is the tagged latest release
yukimochi/mastodon,theoria24/mastodon,tootcafe/mastodon,pinfort/mastodon,abcang/mastodon,pinfort/mastodon,ikuradon/mastodon,ykzts/mastodon,lindwurm/mastodon,masto-donte-com-br/mastodon,maa123/mastodon,abcang/mastodon,Ryanaka/mastodon,ykzts/mastodon,imas/mastodon,im-in-space/mastodon,koba-lab/mastodon,maa123/mastodon,pinfort/mastodon,Ryanaka/mastodon,gol-cha/mastodon,Ryanaka/mastodon,Kirishima21/mastodon,yi0713/mastodon,imas/mastodon,im-in-space/mastodon,cobodo/mastodon,h3zjp/mastodon,glitch-soc/mastodon,lindwurm/mastodon,ykzts/mastodon,abcang/mastodon,MitarashiDango/mastodon,tootcafe/mastodon,ykzts/mastodon,ikuradon/mastodon,lindwurm/mastodon,cobodo/mastodon,maa123/mastodon,h3zjp/mastodon,imas/mastodon,imas/mastodon,yi0713/mastodon,yukimochi/mastodon,koba-lab/mastodon,glitch-soc/mastodon,theoria24/mastodon,gol-cha/mastodon,abcang/mastodon,yi0713/mastodon,theoria24/mastodon,cobodo/mastodon,pinfort/mastodon,tootcafe/mastodon,masto-donte-com-br/mastodon,maa123/mastodon,musashino205/mastodon,musashino205/mastodon,Kirishima21/mastodon,MitarashiDango/mastodon,ikuradon/mastodon,yukimochi/mastodon,yukimochi/mastodon,koba-lab/mastodon,cobodo/mastodon,tootcafe/mastodon,h3zjp/mastodon,gol-cha/mastodon,im-in-space/mastodon,MitarashiDango/mastodon,masto-donte-com-br/mastodon,masto-donte-com-br/mastodon,Ryanaka/mastodon,musashino205/mastodon,Kirishima21/mastodon,koba-lab/mastodon,Kirishima21/mastodon,MitarashiDango/mastodon,im-in-space/mastodon,musashino205/mastodon,lindwurm/mastodon,yi0713/mastodon,ikuradon/mastodon,theoria24/mastodon,h3zjp/mastodon,glitch-soc/mastodon,gol-cha/mastodon,glitch-soc/mastodon