add ignore

.gitignore

@@ -106,14 +106,14 @@ target
 # When using Gradle or Maven with auto-import, you should exclude module files,
 # since they will be recreated, and may cause churn.  Uncomment if using
 # auto-import.
-# .idea/artifacts
+.idea/artifacts
-# .idea/compiler.xml
+.idea/compiler.xml
-# .idea/jarRepositories.xml
+.idea/jarRepositories.xml
-# .idea/modules.xml
+.idea/modules.xml
-# .idea/*.iml
+.idea/*.iml
-# .idea/modules
+.idea/modules
-# *.iml
+*.iml
-# *.ipr
+*.ipr
 
 # CMake
 cmake-build-*/
@@ -240,4 +240,38 @@ $RECYCLE.BIN/
 # Windows shortcuts
 *.lnk
 
-# End of https://www.toptal.com/developers/gitignore/api/eclipse,intellij,windows,macos
+# End of https://www.toptal.com/developers/gitignore/api/eclipse,intellij,windows,macos
+
+HELP.md
+target/
+!.mvn/wrapper/maven-wrapper.jar
+!**/src/main/**/target/
+!**/src/test/**/target/
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+build/
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### VS Code ###
+.vscode/