Install Uptime Kuma on Debian 12

Log into the Linux device. Run the following commands in a terminal window# update software repositories

sudo apt update
# install available software updates
sudo apt upgrade -y
# install prerequisites
sudo apt install git curl -y
# add nodejs software repository
curl -sL https://deb.nodesource.com/setup_current.x | sudo bash -
# install nodejs
sudo apt install nodejs -y
# clone from git
git clone https://github.com/louislam/uptime-kuma.git ./uptime-kuma
# change directory to ./uptime-kuma
cd uptime-kuma
# run setup
npm run setup
# run uptime kuma
node server/server.js

Open a web browser and navigate to http://DNSorIP:3001

Select a language and create an administrator username and password > Click Create

Welcome to Uptime Kuma

Run Uptime Kuma as a Service (Optional, but recommended)

Press CTRL + C to kill the running Uptime Kuma process. Continue with the following steps to run Uptime Kuma as a service# create nodejs user

sudo useradd nodejs
# change directory out of uptime-kuma
cd ..
# move uptime kuma to /opt
sudo mv ~/uptime-kuma /opt
# create service bash file
sudo nano /opt/uptime-kuma/uptime-kuma.sh

Paste the following configuration into uptime-kuma.sh

#!/usr/bin/bash
/usr/bin/node /opt/uptime-kuma/server/server.js

Press CTRL+O, Enter, CTRL+X to write the changes

Continue with the following commands# make uptime-kuma.sh executable

sudo chmod +x /opt/uptime-kuma/uptime-kuma.sh

# create uptime-kuma service file
sudo nano /etc/systemd/system/uptime-kuma.service

Paste the following configuration into uptime-kuma.service[Unit]

Description=Uptime Kuma

[Service]
ExecStart=/opt/uptime-kuma/uptime-kuma.sh
Restart=always
User=nodejs
Group=nodejs
WorkingDirectory=/opt/uptime-kuma

[Install]
WantedBy=multi-user.target

Press CTRL+O, Enter, CTRL+X to write the changes. Continue with the following commands# set owner of /opt/uptime-kuma

sudo chown nodejs:nodejs /opt/uptime-kuma -R
# reload systemd services
sudo systemctl daemon-reload
# start uptime-kuma service on boot and now
sudo systemctl enable uptime-kuma --now

Refresh the open web browser to verify Uptime Kuma is accessible

Src:
https://i12bretro.github.io/tutorials/0614.html