[docs] Gitpod integration with Moodle

[sarjona]

This issue is to document the integration with Gitpod that I implemented during my project week: https://github.com/moodlehq/moodle-docker/#quick-start-with-gitpod

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[github-actions]

⚡️ Lighthouse report for the deploy preview of this PR

URL	Performance	Accessibility	Best Practices	SEO	PWA	Report
/	🟠 69	🟠 87	🟢 92	🟢 90	🟢 100	Report
/docs/apis/commonfiles	🟠 74	🟠 85	🟢 92	🟢 100	🟢 100	Report
/general/development/gettingstarted	🟠 67	🟠 87	🟢 92	🟢 90	🟢 100	Report
/general/releases	🟠 67	🟠 87	🟢 92	🟢 100	🟢 100	Report

[juliavs85]

Thank you for working on this, Sara! These are just some suggestions for tiny changes.

[sarjona]

Hi @juliavs85!
Thanks a lot for all these nice suggestions to improve this page! I applied them all, so the pull-request is ready to get your review again and confirm it's ready to be merged :-)

[sarjona]

The patch is ready :-)

[juliavs85]

Thanks for making the changes!