Add Docker deployment docs

[phaleth]

esbuild and wasm-opt optimization steps aren't explained and also there isn't any css optimization esbuild step included as hello world examples don't yet contain any css file, but I think this is good enough for starters. Feel free to change anything, even any of the wording used, or suggest a change.

[arctic-hen7]

Really great work, thanks so much! Just some minor things on phrasing, and then I'd like all the Dockerfiles to be in <details> blocks for better scrolling support (otherwise people will have to scroll through a huge amount of code to get to what they want).

[phaleth]

I kind of just copy pasted all the suggested changes. Be aware that I can't run the website locally anymore cause of concurrently. The error is posted #97.

[arctic-hen7]

Just some spacing issues that maybe didn't go through properly. We need to have newlines after the <summary> blocks and before the closing </details>, otherwise the Markdown won't render properly. Otherwise great, thanks!

[arctic-hen7]

Great, thanks!