Merge branch 'master' into master

FGRibreau · Nov 4, 2021 · d95b8f2 · d95b8f2
2 parents ee72f81 + c7a6f57
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diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
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 Before you begin:
 - Mailchecker is powered by Node.js. Check to see if you're on the right [version of node in `engines.node`](package.json).
+- Docker is used for setting up and running tests for various platforms. [Install Docker](https://www.docker.com/get-started) and make sure you have `docker` command in `PATH`.
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 ### How to add new domains to the disallow list?