Add Netlify build config to `netlify.toml`

[aminbenselim]

Because there is no default build configuration, using the Deploy to Netlify button results in a successful build that serves an empty website.

I have added a netlify.toml to provide Netlify with the right build config based on the recommended Common configuration directives

I have tried to build my website with this configuration and now it works 👍

Thank you for this awesome Starter. I am going to be using it as my personal wiki pages and I really love it.