server: explicitly use fedora 34 for the fedora image

This allows us to update to the future version(s) at our own pace.
While we're changing things use a fully qualified registry name
from the official fedora registry.

Signed-off-by: John Mulligan <[email protected]>

Author: phlogistonjohn

images/server/Dockerfile.fedora

@@ -7,7 +7,7 @@ ARG SAMBACC_REPO=https://github.com/samba-in-kubernetes/sambacc
 # be changed to use the tag.
 RUN /usr/local/bin/build.sh ${SAMBACC_VER} ${SAMBACC_REPO}
 
-FROM fedora
+FROM registry.fedoraproject.org/fedora:34
 
 MAINTAINER John Mulligan <[email protected]>
 ENV SAMBACC_VERSION="0.1"