Update Modules.js to add documentation about external modules

[GuptaTanisha]

Fixes #1504

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[jywarren]

Looks great, thank you so much!!

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[GuptaTanisha]

My twitter handle is @Tanisha46943764 <https://twitter.com/account/add> <https://twitter.com/account/add>

…

On Wed, Feb 17, 2021 at 11:02 PM welcome[bot] ***@***.***> wrote: Congrats on merging your first pull request! 🙌🎉⚡️ Your code will be published to https://beta.sequencer.publiclab.org in a day or two. Please test out your work on this testing server and report back with a comment that all has gone well! In the meantime, can you tell us your Twitter handle so we can thank you properly also do join our weekly check-in to share your this week goal and the awesome work you did 😃. Please find the link *pinned in the issue section* Now that you've completed this, you can help someone else take their first step! Try looking at this list of first-timers-only issues, and see if someone else is waiting for feedback, or even stuck! 😕 People often get stuck at the same steps, so you might be able to help someone get unstuck, or help lead them to some documentation that'd help. Reach out and be encouraging and friendly! 😄 🎉 See: Public Lab's coding community! <https://code.publiclab.org> — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#1814 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/APNBOHFC5HKJIZ22775H7K3S7P4TJANCNFSM4XYNX27A> .