Rpm: automate rpm building with build-rpm

builder/test-rpm

@@ -7,7 +7,7 @@ cd "$(dirname "$0")"
 
 echo kasmvnctester_${os}:$os_codename
 docker build --build-arg \
-  KASMVNC_PACKAGE_DIR="build" \
+  KASMVNC_PACKAGE_DIR="build/${os}_${os_codename}" \
   -t kasmvnctester_${os}:$os_codename \
   -f dockerfile.${os}_${os_codename}.rpm.test .
 echo docker run -it -p 443:8443 --rm -e "VNC_USER=foo" -e "VNC_PW=bar" \