Add an .editorconfig

.editorconfig

@@ -0,0 +1,14 @@
+# This is the topmost .editorconfig file
+root = true
+
+[*]
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[*.md]
+trim_trailing_whitespace = false
+
+[*.sh]
+indent_style = tab
+indent_size = 4