Adding ignore parameters for gitattributes

Author: pabloem

.gitattributes

@@ -26,3 +26,11 @@ Dockerfile text
 
 # Explicitly denote all files that are truly binary and should not be modified.
 # *.jpg binary
+
+# Declare files that should be ignored when creating an archive of the
+# git repository
+.gitignore export-ignore
+.gitattributes export-ignore
+gradlew export-ignore
+gradlew.bat export-ignore
+/gradle export-ignore