The preview image would be useful to embed in timeline.

Optimizing paperclip

* i18n: (zh-CN) Update translations for #5817

* i18n: (zh-CN) Add translation for #5985

* i18n: (zh-CN) Normalization

* make it possible to stream public timelines without authorization

* Fix

* Make eslint allow `value == null`

* Remove redundant line

* Improve style and revert .eslintrc.yml

* Fix streamWsEnd

* Show IP address instead of (anonymous user)

* Add missing semicolon

Avoid error when the service returns a mostly valid oembed, but has no
url in it, causing a MethodError: undefined method `url'
for #<OEmbed::Response::Photo:0x000056505def9620>

* Change conditional to avoid nil into string error in sidekiq
When obtaining information about users with mastodon in a different
subdomain, sidekiq was giving out a 'no implicit conversion of nil into String'

* Use presence instead of blank? with ternary.
Following suggestion on PR

i18n: Add ja translate

This translation has been supplanted by the flavours-related
translations.

Add missing set pack to authorizations_controller

i18n: Add ja translate for flavour/skin ux

New flavour/skin UX

Remove getting-started picture

preview_card fabricator has a removed attribute, status, and is no longer
functional.

add favourite confirmation modal

i18n: Add translate and fix problems

* Change the disclaimer below the sign up form

Change the disclaimer below the sign up form on the home page. The current text is linking to the /about/more page under "our terms of service" and to the /terms page under "privacy policy". This change intend to make the message more coherent.

Change l’avertissement en-dessous du formulaire d’inscription sur la page d’accueil. Le texte actuel redirige vers /about/more sous un lien intitulé "nos conditions d’utilisation" et vers /terms via "notre politique de confidentialité". Ce changement vise à rendre le message plus cohérent.

* Second take on the disclaimer

A new version of the disclaimer, based on feedback.

Une nouvelle version de l’avertissement, basé sur les premiers retours.