Add an editor config file

.editorconfig

@@ -0,0 +1,14 @@
+# EditorConfig: http://editorconfig.org
+
+# top-most EditorConfig file
+root = true
+
+# Unix-style newlines with a newline ending every file
+[*]
+end_of_line = lf
+insert_final_newline = true
+
+# Indentation for JS & SCSS
+[*.{js, scss}]
+indent_style = space
+indent_size = 2