Move lint.sh to MAkefile

Makefile

@@ -1,2 +1,15 @@
-lint:
-	bash lint.sh .
+.PHONY: lint black isort pylint
+
+lint: black isort pylint
+
+black:
+	@echo "LINTING WITH BLACK"
+	@poetry run black .
+
+isort:
+	@echo "LINTING WITH ISORT"
+	@poetry run isort .
+
+pylint:
+	@echo "LINTING WITH PYLINT"
+	@poetry run pylint --recursive y .

README.md

@@ -84,9 +84,9 @@ alembic upgrade head
 
 #### Linting
 We are using following tools:
-* black - to run use `black <path to file>`
-* isort - to run use `isort <path to file>`
-* pylint - to run use `pylint <path to file>`
+* black - to run use `make black`
+* isort - to run use `make isort`
+* pylint - to run use `make pylint`
 
 If you want to lint every file using all at once you can also run `make lint`