From May 23, 2018 I found the fontello.com is down. Can anyone suggest how can I use the SVG font generated from fontello to add more fonts on other online engines?
Fontello is down. Can I use any alternative for it?
1k Views Asked by Common Tt AtThere are 4 best solutions below

You could use the IcoMoon App, it does the same thing in the browser. You can upload the icons or font svg with drag and drop, like fontello.
Select the icons you want to have in a set and click the download button on the bottom of the screen.

While it's down, you can run it locally.
Source is available here: https://github.com/fontello/fontello
You will need to install git
(https://git-scm.com/downloads) & node
(https://nodejs.org/en/download/).
After that just clone, install and run the project:
git clone https://github.com/fontello/fontello
cd fontello
npm install
node server
After that just navigate to localhost:3000
in your browser
EDIT: this won't work on windows, though.

In case fontello is down - my suggestion for an alternative is to use the following docker image:
https://hub.docker.com/r/avnerner/fontello_server/
docker pull avnerner/fontello_server
docker run -it -p 3000:3000 -d avnerner/fontello_server
Thank you @PragmaticEd for your kindness. But when I start node server, I get :