Add tests command

Makefile

@@ -1,5 +1,7 @@
 PHP = docker compose run php
 
+.PHONY: composer_install composer_update static_analysis tests
+
 composer_install:
 	@$(PHP) composer install
 
@@ -8,3 +10,7 @@ composer_update:
 
 static_analysis:
 	@$(PHP) vendor/bin/psalm
+
+tests:
+	@$(PHP) rm -rf var/cache
+	@$(PHP) vendor/bin/phpunit