You can use binder to run notebooks for free on the web.
Upload your notebook to the web, and copy the link to your notebook file. An easy way to put notebook files online is using https://gist.github.com/
Go to https://pluto-on-binder.glitch.me/ and paste your notebook link into the box. This will generate a binder link for your notebook that you can share with your friends!
This is the public repository that gets launched behind the scenes when you use a link generated by https://pluto-on-binder.glitch.me/.
You probably do not want to fork this repository and use it for another project, these instruction will come soon. This is also not the recommended way to install Pluto as a jupyter extension. For this, we are working on https://github.com/fonsp/pluto-on-jupyterlab.
Reading the source code of this repository might be confusing! But to Pluto's developers: have a look at the different branches, the master branch is for the demo link, all other branches are for other experiments.