add event

[markcmiller86]

Description

EB Member: @curfman

Resolves #2170

Original markdown submitted in above issue by @marcwitasee. Was copied and deck-text reduced to produce this PR

PR checklist for files displayed on bssw.io site

• [Author] @mention the BSSw.io editorial board member @<eb-member-id> in Description above assigned to shepherd your PR.
• [Author] Add the <issue-id> in the Description above for the associated GitHub Issue.
• [ ] [Author] Ensure wikize_refs.py -i <base>.md is run and commit (if using wikize_refs.py).
• [Author] Inspect the content in the *.md file(s) as rendered in GitHub for this PR.
• [EB Mem] Assign this PR to the EB member <eb-member-id>.
• [EB Mem] Assign this PR to the author of the PR <pr-author-id>.
• [EB Mem] Add one or more Reviewers.
• [EB Mem] Add label content: <content-type> for the type of contribution.
• [EB Mem] Add to Project Content Development (see Content Development).
• [EB Mem] Add meta-data to the *.md file(s) (set Publish: yes).
• [EB Mem] Add label preview (so PR branch will be merged to 'preview' branch and watch for possible merge failures).
• [EB Mem] Rebuild preview site and confirm new content is there, renders correctly and is returned in searches.
• [Author] Make any final changes to the PR based on feedback.
• [ ] [Author] Ensure wikize_refs.py -i <base>.md is run and commit (if using wikize_refs.py).
• [EB Mem] Rebuild preview site and re-confirm content looks correct.
• [EB Mem] Ensure at least one reviewer signs off on the final changes.
• [EB Mem] Move the PR to "Ready to Publish" in Content Development.
• [EB Mem] Leave comment and @mention @betterscientificsoftware/bssw-maint (BSSw Maint) asking to carry out final publication steps.
• [BSSw Maint] Verify that all needed files are present in the PR (article, images, updates to Site/Homepage.md carousel and/or Site/Announcements/Announcements.md as appropriate).
• [BSSw Maint] Merge PR. (Should automatically move to "Done" in Content Development.)
• [BSSw Maint] Verify new contribution shows up on bssw.io as expected.

NOTE:

• Checklist items prefixed with [Author] are expected to be performed by the author of the PR or can be performed by the author.
• Checklist items prefixed with [EB Mem] must be performed by a BSSw.io Editorial Board (EB) Member.
• Checklist items prefixed with [BSSw Maint] must be performed by someone in the @betterscientificsoftware/bssw-maint team (hint: type @, b, s, s, w, -, m to auto-complete to @betterscientificsoftware/bssw-maint).