matrix-synapse: Ingress breaks with ingress-nginx > 4.12.0

admission webhook "validate.nginx.ingress.kubernetes.io" denied the request: ingress contains invalid paths: path /.well-known/matrix cannot be used with pathType Prefix

It does work with < 4.12.0 of ingress-nginx.

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information