Just had an issue with invoices (PDF). Managed to get that working after looking through this.
Installed all using the command below.
apt install libnss3 libatk1.0-0 libatk-bridge2.0-0 libcups2 libdrm-common libdrm2 libxcomposite1 libxdamage1 libxext6 libxfixes3 libxrandr2 libgbm1 libxkbcommon0 libpango-1.0-0 libcairo2 libasound2 -y
PDF now works.
Still working on the whole initial setup part - but I’m currently trying to get my instance functional - backup/snapshot - then go back and try again. Things like above that come up will be integrated into the instructions at the end for a smooth experience.