Image Optimization for Board Photos

See merge request !3

Update to newest version after release of new website

See merge request vseth/0500-kom/0522-thealt/website!2

# Conflicts:
#   components/eventCard.jsx
#   components/signUpsModal.jsx
#   components/toc.jsx
#   graphql/resolvers.js
#   graphql/schema.js
#   public/locales/de/common.json
#   public/locales/en/common.json
#   styles/globals.css
#   thealternative.config.js
#   utilities/dates.js
#   utilities/hasAccess.js

Version 1.0

See merge request vseth/0500-kom/0522-thealt/website!1