Use same git-ignore for all projects.

Author: uhafner

.gitignore

@@ -2,11 +2,12 @@ node
 node_modules
 target
 *.iml
-.idea
 .classpath
 .project
 .settings
 pom.xml.versionsBackup
 pom.xml.releaseBackup
 release.properties
 .DS_Store
+.idea
+/package-lock.json