remove code health badge and add pre-commit

.pre-commit-config.yaml

@@ -0,0 +1,28 @@
+exclude: 'docs|node_modules|migrations|.git|.tox'
+default_stages: [commit]
+fail_fast: true
+
+repos:
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v3.4.0
+    hooks:
+      - id: trailing-whitespace
+      - id: end-of-file-fixer
+      - id: check-yaml
+
+  - repo: https://github.com/psf/black
+    rev: 21.4b2
+    hooks:
+      - id: black
+
+  - repo: https://github.com/timothycrosley/isort
+    rev: 5.8.0
+    hooks:
+      - id: isort
+
+  - repo: https://gitlab.com/pycqa/flake8
+    rev: 3.9.1
+    hooks:
+      - id: flake8
+        args: ['--config=setup.cfg']
+        additional_dependencies: [flake8-isort]

README.md

@@ -3,7 +3,6 @@ Django Scheduler
 
 [![Gitter](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/llazzaro/django-scheduler)
 [<img src="https://img.shields.io/travis/llazzaro/django-scheduler.svg">](https://travis-ci.org/llazzaro/django-scheduler)
-[![Code Health](https://landscape.io/github/llazzaro/django-scheduler/master/landscape.svg?style=flat)](https://landscape.io/github/llazzaro/django-scheduler/master)
 [<img src="https://img.shields.io/coveralls/llazzaro/django-scheduler.svg">](https://coveralls.io/r/llazzaro/django-scheduler)
 [<img src="https://img.shields.io/pypi/v/django-scheduler.svg">](https://pypi.python.org/pypi/django-scheduler)
 [![Documentation Status](https://readthedocs.org/projects/django-scheduler/badge/)](https://django-scheduler.readthedocs.io/)