Classmates in the change room

How to create a healthy and friendly work environment in a company? My business is not that big, there are not so many employees, and there is no community or unity.

No one is forcing you to be friends, but there is always a difference between dry office communication and a friendly work team. It is very important for me to support my colleagues and get support from them, so we always congratulate each other on various events, holidays, and also send congratulations on promotion email. It is not necessary to write a giant text. Sometimes sharing good news with a colleague is enough.