* added mastodon provider to oauth code
* changed go.mod and vendor/modules.txt to add updated goth
* vendored mastodon and new goth
* committing result of go mod tidy && go mod vendor
* added pic and mastodon to oauth models
* handled instance url
* applied lafriks suggestion
* Update web_src/js/index.js
Co-authored-by: techknowlogick <matti@mdranta.net>
Co-authored-by: techknowlogick <techknowlogick@gitea.io>
Co-authored-by: Lauris BH <lauris@nix.lv>
Co-authored-by: techknowlogick <matti@mdranta.net>
