Create docs on how to contribute content

[Mariatta]

Write up instructions:

1. How to write up new blog post?
2. Images should be converted using webp eg cwebp -q 60 original_photo.jpg -o new_photo.webp

[Mariatta]

This is related to #197. I'd like to know how to go about adding sections/folders in the "docs" directory. How should the layout/template be adjusted to support the additional folders?

I think we'd need different sections:

1. Role descriptions
2. General team member responsibilities
3. GitHub contribution workflow (how to add more content to the site), which could include how to write new blog post, add images, etc
4. More specific task documentation: eg how we use 1password, jelly, discord, etc.

[laisbsc]

Linking related issues:

1. Write Docs about 1Password usage #206
2. Write Docs on how to use Jelly #205
3. No issue yet on Discord docs
4. No docs yet on GitHub Contribution Workflow
5. Create docs on how to contribute content #213
6. Add more sections in the Docs page #197
7. Add doc on how to start a new Conference year #200