🔧 Add editor config file

.editorconfig

@@ -0,0 +1,24 @@
+# EditorConfig is awesome: http://EditorConfig.org
+
+# top-most EditorConfig file
+root = true
+
+# Unix-style newlines
+# Newline ending every file
+# Trim trailing whitespaces
+# Set charset
+[*]
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true
+charset = utf-8
+
+# 4 space indentation
+[*.js]
+indent_style = space
+indent_size = 4
+
+# 2 space indentation
+[*.{yml,json}]
+indent_style = space
+indent_size = 2