Relates to #44 - Fix stable Docker images

Stable Docker images (ones built from git-tags, previously from `main`)
were failing due to the Zypper GPG checks. The GPG checks do not have
the public key from our repository necessary for accepting signed RPMs.

This bypasses those checks, allowing stable Docker builds to work.

Dockerfile

@@ -30,7 +30,7 @@ RUN     mkdir /files
 COPY    dist/rpmbuild/RPMS/x86_64/ /files
 
 RUN     ls -l /files && \
-        zypper -n in --allow-unsigned-rpm -y /files/canu*.rpm
+        zypper --no-gpg-checks -n in --allow-unsigned-rpm --auto-agree-with-licenses -y /files/canu*.rpm
 
 # set file perms for canu
 RUN      chown -R canu /files /home