Add Debian packages, support Ubuntu 22 via tomli

README.md

@@ -40,6 +40,16 @@ but not necessarily to make it perfect.
 
 ## How to install it
 
+### Ubuntu/Debian apt repository
+
+```bash
+sudo mkdir -p /usr/share/keyrings
+curl -fsSL https://mig5.net/static/mig5.asc | sudo gpg --dearmor -o /usr/share/keyrings/mig5.gpg
+echo "deb [arch=amd64 signed-by=/usr/share/keyrings/mig5.gpg] https://apt.mig5.net $(lsb_release -cs) main" | sudo tee /etc/apt/sources.list.d/mig5.list
+sudo apt update
+sudo apt install jinjaturtle
+```
+
 ### From PyPi
 
 ```