Found via `codespell -q 3 -L ascript,caf,clen,fo,nd,oen,pres,som,te,tread,warks -S "*.patch"`
This PR complies with the DCO; https://developercertificate.org/
* add readme section on using amazon/aws s3 as storage
* mention http/https confusion caused by incorrectly configured cloudflare
* improve custom-font notes
* docker: ftp-server howto
* docker: suggest moving hist-folders into the config path
and switch the idp docker-compose files to use the
main image, in anticipation of v1.11