Add '/build' folders to .gitignore
diff --git a/.gitignore b/.gitignore
index 7688171..4a365e3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,6 +6,9 @@
 
 ## Intellij
 out/
+build/
+storage/build/
+contactsbackup/build/
 /lib/
 .idea/*
 !.idea/runConfigurations*