Gatsby: Write better documentation for loading remote images in source plugins (createRemoteFileNode)

[jlengstorf]

A common problem we've been seeing for people creating source plugins is that it's really hard to find information about how to pull in remote images for use with gatsby-image, etc.

The only docs on it now are tucked away in gatsby-source-filesystem. We should create an additional section in the main docs on how to do this. (Really, we need a whole tutorial on writing source plugins in the docs, but we can start here.)

[jlengstorf]

@alexluong wrote up this tutorial, which could lay a great foundation for these docs.

[alexluong]

@jlengstorf We already have a tutorial for writing source plugins. I think you're the one who wrote it (gatbsy-source-pixabay). Maybe we can just update it with createRemoteFileNode to use with gatsby-image?

[stoutlabs]

There's also a (nearly hidden) link to a create a source plugin page tucked away near the bottom of that tutorial.

This is actually something I've noticed a few times when using the v2 docs: There are a few things that aren't easily found without scanning thru another page, and they probably need a link from the docs menu for ease of access. (An example that comes to mind is the list of starters.)

[KyleAMathews]

Due to the high volume of issues, we're closing out older ones without recent activity. Please open a new issue if you need help!

[KyleAMathews]

Also in v2, the various plugin writing docs are all now in the same group 🎉

[borekb]

This is also a great article: Wrangling remote images with Gatsby