gpg: directory `/root/.gnupg' created
gpg: new configuration file `/root/.gnupg/gpg.conf' created
gpg: WARNING: options in `/root/.gnupg/gpg.conf' are not yet active during this run
gpg: keyring `/root/.gnupg/secring.gpg' created
gpg: keyring `/root/.gnupg/pubring.gpg' created
gpg: requesting key F6C9FC19 from hkp server ha.pool.sks-keyservers.net
gpgkeys: key E8EB406377AD2B9E9A4765D19CB3BC6FF6C9FC19 not found on keyserver
gpg: no valid OpenPGP data found.
gpg: Total number processed: 0
I cannot build the Dockerfile anymore because the gpg key seems to be missing.
results in
http://ha.pool.sks-keyservers.net/pks/lookup?search=0xF6C9FC19&op=vindex