Merge branch 'hotfix_bump_demo_version_nr' into 'master'

fix(release): ought to fix issue #4 faulty version numbers for demo container

See merge request FraDrive/fradrive!4

.versionrc.js

@@ -22,6 +22,10 @@ module.exports = {
     {
       filename: 'nix/docker/version.json',
       type: 'json'
+    },
+    {
+      filename: 'nix/docker/demo-version.json',
+      type: 'json'
     }
   ],
   commitUrlFormat: 'https://gitlab2.rz.ifi.lmu.de/uni2work/uni2work/commit/{{hash}}',