Setup

On a raspberry pi:

Install

git clone https://code.techinc.nl/emilevs/label_printer.git
sudo apt install python3-flask
sudo apt install golang

(there might be more dependencies, I wasn't starting from a clean raspbian install when testing this)

run make to build the go library

cp label_printer.service to /etc/systemd/system/

sudo systemctl enable label_printer
sudo systemctl start label_printer

The interface will now be running on localhost:5000, which we need to route to the outside world in the next step

sudo apt install nginx edit /etx/nginx/sites-available/default and change the contents of:

location / { }

to:

location / {
    proxy_pass http://127.0.0.1:5000;
    proxy_redirect http://127.0.0.1:5000 $scheme://$host:5000;
}

sudo systemctl restart nginx

edit /etc/dhcpcd.conf and add:

static ip_address=10.209.10.2/24
static routers=10.209.10.254
static domain_name_servers=10.209.10.255