ssh-keygen -t ed25519
Move-Item -Path c:\Users\david\filename* - Destination c:\Users\david\.ssh -Force
I open Windows Terminal Settings
I open the JSON file and add the following:

            {
                "colorScheme": "Ubuntu-ColorScheme",
                "commandline": "ssh -i \"~/.ssh/example\" [email protected]",
                "experimental.retroTerminalEffect": false,
                "font": 
                {
                    "face": "Cascadia Code"
                },
                "guid": "{0caa0dad-35be-5f56-a8ff-XXXXXXXXXXXXX}",
                "hidden": false,
                "name": "FIREFLY-01",
                "tabTitle": "FIREFLY-01"
            },

I confirm the GUID is unique and save the JSON file

Configure SSH

Steps performed on FIREFLY-01

mkdir /home/david/.ssh
nano /home/david/.ssh/authorized_keys
I paste in the public key and save authorized_keys
chmod 600 /home/david/.ssh/authorized_keys
sudo nano /etc/ssh/sshd_config
- PermitRootLogin no
- PubkeyAuthentication yes
- PubkeyAcceptedKeyTypes ssh-ed25519
- PasswordAuthentication no
- AuthorizedKeysFile /home/david/.ssh/authorized_keys
I save sshd_config
sudo sshd -t
sudo systemctl restart ssh

Configure UFW

Steps performed on FIREFLY-01

sudo apt install ufw
sudo ufw allow 22
sudo ufw allow 80
sudo ufw allow 81
sudo ufw enable

Install Firefly III Dependencies

Steps performed on FIREFLY-01

sudo mkdir /apps
sudo mkdir /apps/firefly
sudo apt install docker
sudo apt install docker-compose

Install Firefly III

Steps performed on FIREFLY-01

cd /apps/firefly
wget https://raw.githubusercontent.com/firefly-iii/docker/main/docker-compose-importer.yml
wget https://raw.githubusercontent.com/firefly-iii/firefly-iii/main/.env.example
wget https://raw/githubusercontent.com/firefly-iii/docker/main/database.env
wget https://raw.githubusercontent.com/firefly-iii/data-importer/main/.env.example
sudo nano .importer.env
- FIREFLY_III_URL=http://app.8080
sudo nano .env
- DB_PASSWORD=secret_firefly_password
sudo nano .db.env
- MYSQL_PASSWORD=secret_firefly_password
sudo docker-compose pull
sudo docker-compose up -d

Testing the installation at http:/firefly.domain.local in a browser is successful! It brought me to a registration page. Nice and easy, I like it! Now I just have to figure out how to use the software.