Split configuration layers out of the dnf install layer

Dockerfile

@@ -14,11 +14,15 @@ RUN set -e; \
 		dnf config-manager setopt \
 			updates.baseurl=${REPO_MIRROR}/fedora/linux/releases/${VERSION_ID}/Everything/${ARCH}/os/; \
 		dnf config-manager setopt updates.metalink=; \
-	fi; \
+	fi;
+
+RUN set -e; \
 	dnf install -y podman-docker; \
-	touch /etc/containers/nodocker; \
-	rm -f /etc/containers/storage.conf; \
 	dnf clean all; \
 	rm -rf /var/cache/yum;
 
+RUN set -e; \
+	touch /etc/containers/nodocker; \
+	rm -f /etc/containers/storage.conf;
+
 ENTRYPOINT ["/usr/bin/podman", "system", "service", "--time", "0", "unix:///var/run/docker.sock"]