add contributing.md and .pre-commit-config.yaml

.gitignore

@@ -104,3 +104,6 @@ ENV/
 
 # Project specific
 tests/plugins/test.db
+
+# pycharm
+.idea/

.pre-commit-config.yaml

@@ -0,0 +1,18 @@
+fail_fast: false
+files: ^(tests|hbmqtt|samples)/
+repos:
+- repo: local
+  hooks:
+  - id: flake8
+    name: flake8
+    entry: flake8
+    language: system
+    args: ["--ignore=E501,W503,W605,E722"]
+    types: [python]
+
+  - id: black
+    name: Black
+    entry: black
+    args: [--check]
+    language: system
+    types: [python]

contributing.md

@@ -0,0 +1,14 @@
+# Contributing to AMQTT
+
+:+1::tada: First off, thanks for taking the time to contribute! :tada::+1:
+
+The following is a set of guidelines for contributing to AMQTT on GitHub. These are mostly guidelines, not rules. Use your best judgment, and feel free to propose changes to this document in a pull request.
+
+## Testing
+
+When adding a new feature please add a test along with the feature. The testing coverage should not decrease.
+If you encounter a bug when using AMQTT which you then resolve, please reproduce the issue in a test as well.
+
+## Style and linting
+
+We use `black` at default settings along with `flake8`. To avoid repeated pushes to satisfy our CI linter, you can use [pre-commit](https://pre-commit.com). Install the necessary hooks with `pre-commit install`.