Merge branch 'master' into improve-websockets

CONTRIBUTING.md

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+# Welcome to contributing guide ✌️
+
+I appreciate your contribution! I want to make contributing to this project as easy as possible, whether it's:
+* Reporting a bug/security issue 🐞
+* Proposing new features ✨
+* Submitting some fixes 🔧
+
+## Github is your friend 🧠
+
+You are welcome to open pull requests.
+
+* Just fork this repository 🍴
+* If you made some changes, do not forget about adding tests 🧪
+* Lint your code (e.g. I use black) 📄
+
+I use GitHub for tracking public bugs. You can open any issue from the website easily.
+> But, if you found serious security issues it is better to write through email (check SECURITY.md).
+
+
+## Reporting bugs 🐛
+
+* Write a specific problem/bug, and some summary ✅
+* Include a sample of the code and a clear screenshot 🖥
+* If you can, try to think about possible 💪
+
+**Follow PEP8 rules.**
+
+<hr>
+
+Abduaziz Ziyodov, Docker-Dashboard