Added Discord Invite to intro.md

[FutzMonitor]

📑 Summary

I added a Discord invite link to the intro.html file so that new contributors can quickly join the Mermaid DIscord server and chat with other members of the community.

This doesn't resolve any issue in the issue tracker.

📏 Design Decisions

I simply created an invite link that didn't expire and added it to the page.

📋 Tasks

Make sure you

• 📖 have read the contribution guidelines
• 💻 have added necessary unit/e2e tests.
• 📓 have added documentation. Make sure MERMAID_RELEASE_VERSION is used for all new features.
• 🔖 targeted develop branch

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (b043d79) 73.73% compared to head (a9c08a8) 79.51%.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #5261      +/-   ##
===========================================
+ Coverage    73.73%   79.51%   +5.78%     
===========================================
  Files          164      175      +11     
  Lines        13864    14396     +532     
  Branches       741      855     +114     
===========================================
+ Hits         10222    11447    +1225     
+ Misses        3467     2755     -712     
- Partials       175      194      +19     

Flag	Coverage Δ
e2e	85.09% <ø> (+6.93%)	⬆️
unit	43.22% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

see 43 files with indirect coverage changes

[thedustin]

Hey, I had the same thought as you, but discovered that it is already done (and in more places than we had in mind): #5225

Seems like it is just not merged back to develop, and deployed to the live site.

[FutzMonitor]

@thedustin Thank you for pointing this out. I see that it's been merged now, so I'll close my PR.

[FutzMonitor]

I'm looking at the PR again @thedustin and it doesn't seem to have updated the page I was thinking of updating which was the website's contributing page.

[thedustin]

Hey FutzMonitor, as you can see the intro.md was adjusted too:

• https://github.com/mermaid-js/mermaid/pull/5225/files#diff-c302e3f1ccf1bb15cabd9a46c7d1dc840d9f535be90aa7425bbdd2024e98c87c
• https://github.com/mermaid-js/mermaid/pull/5225/files#diff-0c652d2402261d43f16635c83d89964afd9b514dcd8003d5abcf647819068b15