My go-to .editorconfig file

.editorconfig

# http://editorconfig.org
root = true

[*]
charset = utf-8
indent_style = space
indent_size = 2
end_of_line = lf
insert_final_newline = true
trim_trailing_whitespace = true

[**.{md,mdx,mkd,markdown}]
trim_trailing_whitespace = false