There's nothing special about installing it in the cloud. I recommend using Windows, it's a bit easier and more automated than using Linux. Deploy a VM with 8G+ RAM and run the installer.
If you intend to have Dynatrace recieve the EasyTravel data, be sure to read the directions on editing the easytravel properties file, this info is located on the same download page Karolina mentioned above.
is newer easyTravel (which seems to be an Angular app) also available for our environments?
I realized that it appears on demo site when I selected applications which are enabled to capture Session replay.
You can find latest easyTravel installer here: Demo Applications (look for latest easyTravel version).
The new Angular frontend will be enabled when running scenario 'Standard with REST service and Angular2 frontend (experimental)'. It will be available on port 9080.
If you want to enable traffic generation to the Angular frontend, you need to modify following properties in easyTarvelConfig.properties file:
Load generator for Angular forntend is using headless chrome. On Linux following additional libraries are required to run it: libgtk-3-0 libxss1 libasound2