[question] How to write config file by lua?

I wrote config codes in `markdown.lua` file, as follows:
```lua
require('markdown-preview').setup {
vim.g.mkdp_browser = "C:/Program\ Files/Google/Chrome/Application/chrome.exe"
}
```
**But it doesn't work, error as follows:**
```
Error while calling lua chunk: ... /markdown.lua:2: '}' expected (to close '{' at line 1) near '='
```
I don't understand.