Only archive the cacert-boardvoting binary and the config example

Jenkinsfile

@@ -27,7 +27,7 @@ pipeline {
         }
         stage('Create build output') {
             steps {
-                archiveArtifacts artifacts: 'cacert-boardvoting,templates/**,db/**,config.yaml.example,static/**'
+                archiveArtifacts artifacts: 'cacert-boardvoting,config.yaml.example'
             }
         }
     }