Add mode to build log

Author: taylortom

lib/UiBuild.js

@@ -266,7 +266,7 @@ class UiBuild {
     if (forceRebuildFlag) rebuildReason = '--rebuild-ui flag passed'
     else if (rebuildFileExists) rebuildReason = `${path.basename(this.rebuildFilePath)} file found`
 
-    this.log('info', `${rebuildReason}, building UI`)
+    this.log('info', `${rebuildReason}, building UI in ${this.isDev ? 'dev' : 'production'} mode`)
     try {
       await this.initBuildFolder()
       await Promise.all([