Merge pull request #440 from axonivy/Add_Code_of_Conduct

Add CODE_OF_CONDUCT.md file to repo

CODE_OF_CONDUCT.md

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+## Our Pledge
+
+We as members, contributors, and leaders pledge to make participation in our community a harassment-free experience for everyone. 
+As part of the Ricoh Group, Axon Ivy is guided by [The spirit of the three loves](https://www.ricoh.com/about/ricoh-way):
+
+- **Love your neighbor** 🤝  
+We love to get in touch with people and are willing to help others when we get aware of their issues and ideas. Everyone that participates as user or contributor in this repository, is our neighbor.
+
+- **Love your country** 🗺  
+We love the place we’re located at and enjoy the nature around us. We take care of the environment and are eager to learn from cultures around the globe.
+
+- **Love your work** 👷‍♂️  
+We are passionate developers, eager to work with new technologies and happy to be part of the digital transformation. We love to be creative at work and seeing our visions accomplished.
+
+## Our Guidelines
+
+This repository is intended to facilitate a friendly and inspiring exchange in which we focus on technical content. 
+
+- Be friendly and patient.
+- Be welcoming.
+- Be considerate.
+- Be respectful.
+- Be careful in the words that you choose.
+- When we disagree, try to understand why.