Reintroduce .gitignore file as it expected to be

.gitignore

@@ -1,3 +1,33 @@
-//gradle
+# Intellij files
+
+.idea/*
+!.idea/copyright
+!.idea/scopes
+
+# Mac OS files
+
+.DS_Store
+
+# Compiled class file
+*.class
+
+# Log file
+*.log
+
+# Package Files #
+*.jar
+!gradle-wrapper.jar
+
+*.war
+*.nar
+*.ear
+*.zip
+*.tar.gz
+*.rar
+
+# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
+hs_err_pid*
+
+# gradle
 build
 .gradle