Yes @Paul-Reed has made a nice tutorial. But it requires that Node-RED is restarted from time to time. Therefore we are discussing a new feature for automatic certificate renewal (i.e. renew the certificates at a regular intervals while Node-RED keeps running). Hopefully we can get an agreement about it for Node-RED version 1.1.0 Fingers crossed ...
On the other hand I have created (not on Github yet) a new node to integrate Letsencrypt entirely in Node-RED. It allows you to request a new LetsEncrypt certificate fully automatically. That node already works fine, but it is not userfriendly enough. Will need to find some time to start a discussion about it first, with people that know more about the topic than me ...
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