feat(post): add embedding youtube videos

Closes #35
chore(release): release v0.21.0
feat(diary): add youtube embedding in the diary
fix(youtube-embed): add aspect ratio videos
chore(release): release v0.21.1
chore(release): release v0.21.2
chore(api): update to new api
chore(release): release v0.21.3
refactor(user): change how login works, no more 404
chore(release): release v0.21.4
chore(release): release v0.21.5
chore(release): release v0.21.6
chore(download-url): update url
refactor(landing): change text on landing page banner
refactor(landing): change text in banner
refactor(api): remove extra api code
refactor(proxy): setup for new server
chore(release): release v0.21.7
chore(release): release v0.21.8
chore(release): release v0.21.9