The biggest problem in Europe in the past was the constant war between the nations, Germany and France in particular. How do You reduce the willingness to go fight each other. You create connections.
Economic connections in the form of the coal and steel alliance, which evolved to become the EU.
Personal connections by connecting the people between the countries with multinational friendship. Twin cities are one tool creating the friendship. By having regular exchanges between students and adults. You don’t want to go to war with a friend you visited every summer. That’s also the reason for the Erasmus program, where you can have an exchange semester at university.
All of those were implemented since the WW2 and they seem to work. There hasn’t ever been a period of such a long peace in central Europe.
This is how I deploy my personal website today. The holster doesn’t give ash access.