You need to have docker installed first. Install Owdex, set it up and run it as follows:
# Get the files
git clone https://github.com/owdex/compose.git owdex
cd owdex
# Run the setup script
chmod +x setup.sh
sudo ./setup.sh
# Edit necessary files
nano owdex.toml
nano misc/Caddyfile
# Run Owdex in background
docker compose up -d