Add pre-commit hooks

Fixes #12

.pre-commit-config.yaml

@@ -0,0 +1,17 @@
+---
+repos:
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v3.0.1
+    hooks:
+      - id: check-merge-conflict
+      - id: check-yaml
+      - id: end-of-file-fixer
+  - repo: https://github.com/shellcheck-py/shellcheck-py
+    rev: v0.7.1.1
+    hooks:
+      - id: shellcheck
+  - repo: https://github.com/IamTheFij/docker-pre-commit
+    rev: v2.0.0
+    hooks:
+      - id: docker-compose-check
+      - id: hadolint

Makefile

@@ -4,10 +4,17 @@
 default: test
 
 .PHONY: test
-test:
+test: check
 	docker-compose -f ./tests/docker-compose-private.yml up \
 		--build --force-recreate \
 		--abort-on-container-exit --exit-code-from plugin
 	docker-compose -f ./tests/docker-compose-public.yml up \
-		--build --force-recreate \
 		--abort-on-container-exit --exit-code-from plugin
+
+.PHONY: install-hooks
+install-hooks:
+	pre-commit install
+
+.PHONY: check
+check:
+	pre-commit run --all-files