This NodeBB plugin will allow you to add polls to the first post of a topic with the following markup:

[poll <settings>]
- Poll option
- Another option
[/poll]

Currently supported settings:

maxvotes="1" //Max number of votes per user. If larger than 1, a multiple choice poll will be created
disallowVoteUpdate="0" //if set, users won't be able to update/remove their vote
title="Poll title" //Poll title

There's also a helpful modal available that will allow you to easily create a poll:

• Add the ability to edit a poll
• Anonymous voting
• A lot more...

If you're willing to help, please make any improvements you want and submit a PR.

Either through the NodeBB ACP or:

npm install nodebb-plugin-poll