build stable with stable tag

See merge request TransFem-org/Sharkey!386

(cherry picked from commit 3b2d47b1)

Merge branch 'gitlab-ci' into 'develop'

See merge request !383

Originally from PR #288

Reviewed-on: https://git.joinsharkey.org/Sharkey/Sharkey/pulls/287

`globSync` doesn't guarantee the order in which it returns the
matching paths, so without the `sort()`, the config files may be
merged differently each time the server is started

Reviewed-on: https://git.joinsharkey.org/Sharkey/Sharkey/pulls/284

Reviewed-on: https://git.joinsharkey.org/Sharkey/Sharkey/pulls/283

note length is now configurable through the config file

Closes #281

falls back to 3000 (misskey default) if not used/included in config

I could have factored out all the lines that set cache headers, but
that would have made future merges even more complicated ☹️

thanks ShittyCopper for reporting the problem!

Also adds the visibility function to mastodon imports

Glitchy/Broken CSS - Won't get any fixes by free so it is best to just undo the change

Closes #279
Closes #278

Seems like due to misskey deleting reaction.vue and making it a new file called emoji-picker.vue caused the default like setting to vanish

Reviewed-on: https://git.joinsharkey.org/vavency/Sharkey/pulls/1