Update file .editorconfig

.editorconfig

@@ -0,0 +1,18 @@
+# EditorConfig is awesome: https://EditorConfig.org
+# top-most EditorConfig file
+root = true
+
+# Unix-style newlines with a newline ending every file
+[*]
+charset = utf-8
+end_of_line = lf
+indent_style = space
+indent_size = 2
+trim_trailing_whitespace = true
+insert_final_newline = true
+
+[*.{py,html,mjml}]
+indent_size = 4
+
+[Makefile]
+indent_style = tab