Specify more indentation rules

* defaults to 4 spaces (js,html,conf)

.editorconfig

@@ -4,11 +4,12 @@ root = true
 charset = utf-8
 end_of_line = lf
 insert_final_newline = true
+indent_style = space
+indent_size = 4
 
-[{package.json,.travis.yml}]
+[{package.json,.travis.yml,Dockerfile}]
 indent_style = space
 indent_size = 2
 
-[*.js]
-indent_style = space
-indent_size = 4
+[*.sh]
+indent_style = tab