I want to deploy it on my DigitalOcean

On your first host must be:

1. Installed terraform v0.12.16
2. Configured StrictHostKeyChecking no in ssh_config

Prepare your Digital Ocean

1. Create a token: API -> Tokens/Keys -> Generate token and save it
2. Add your public key Security -> Add SSH Key
3. Create 3 floatings (you can create it only when you have a droplet so you should create a droplets defore)

Prepare your script

1. Change floating ip's in droplet1.tf, droplet2.tf and droplet3.tf to yours
2. Change ip's in start to yours
3. Change DigitalOcean token in start to yours

Start deployment

To start deployment use start script