Add rest2html binary to images

[Julio Carlos Barrera Juez]

Hi!

I love your Docker images and I used daily. But I would like to use ReStructuredText and I can't build my Hugo site because when I try to do it your image misses rst2html.

May you add rst2html to your images?

Thank you!

[Erlend Klakegg Bergheim]

Hi,

Thank you for bringing this to my attention.

I've decided to make it available in the ext images only as I expect rst2html is not widely used in combination with Hugo.

I've added it for release after next Hugo release. You may test it today using the edge on Docker Hub.

[Julio Carlos Barrera Juez]

Works like a charm on edge images. Thank you!