etherpadtest | time collaborative editor scalable to thousands

You'll need git and node.js installed (minimum required Node version: 10.13.0). To update to the latest released version, execute git pull origin. The next start with bin/run.sh will update the dependencies.
Move to a folder where you want to install Etherpad. Clone the git repository: git clone --branch master git://github.com/ether/etherpad-lite.git
Change into the new directory containing the cloned source code: cd etherpad-lite
run bin/run.sh and open http://127.0.0.1:9001 in your browser.
You'll need node.js and (optionally, though recommended) git. Now, run start.bat and open http://localhost:9001 in your browser. Update to the latest version with git pull origin, then run bin\installOnWindows.bat, again.
Grab the source, either
download https://github.com/ether/etherpad-lite/zipball/master
or git clone --branch master https://github.com/ether/etherpad-lite.git
With a "Run as administrator" command prompt execute bin\installOnWindows.bat
Start the server manually (e.g. node/node_modules/ep_etherpad-lite/node/server.js)
Edit the db filename in settings.json to the relative directory with the file (e.g. application/lib/etherpad-lite/var/dirty.db)
Add auto-generated files to the main project .gitignore
If you have enabled authentication in users section in settings.json, it is a good security practice to store hashes instead of plain text passwords in that file. This is especially advised if you are running a production installation. Please install ep_hash_auth plugin and configure it. If you prefer, ep_hash_auth also gives you the option of storing the users in a custom directory in the file system, without having to edit settings.json and restart Etherpad each time.