Replace old run.sh with simpler Makefile

.docker/Makefile

@@ -0,0 +1,22 @@
+VERSIONS = php-5.6 php-7.0 php-7.1 nightly
+
+all: build test clean
+
+build:
+	@echo ">> building images"
+	docker-compose build
+
+test:
+	@- $(foreach version,$(VERSIONS), \
+		echo ">> run tests with $(version)"; \
+		docker-compose run --rm $(version) php bin/security-checker.phar security:check ./composer.lock --end-point=http://security.sensiolabs.org/check_lock; \
+		docker-compose run --rm $(version) php bin/phpcs.phar --standard=PSR2 ./src -v; \
+		docker-compose run --rm $(version) php bin/phpmd.phar ./src text ./phpmd.xml; \
+		docker-compose run --rm $(version) php bin/phpcpd.phar ./src; \
+		docker-compose run --rm $(version) php bin/phpunit.phar; \
+		printf "\033c"; \
+	)
+
+clean:
+	@echo ">> cleanup"
+	docker-compose rm -f &>/dev/null

.docker/README.md

@@ -10,32 +10,7 @@ To avoid development failures you can use this tiny suite which executes all nee
 ## Usage
 
 ```
-$ chmod +x ./run.sh
-$ ./run.sh
-```
-
-## Example output
-
-On success
-
-```
-Run checks with PHP 5.6.25                                                      [ INFO ]
-Run security-checker                                                            [  OK  ]
-Check PSR2 codestyle                                                            [  OK  ]
-Run copy paste detection                                                        [  OK  ]
-Run tests                                                                       [  OK  ]
-Run checks with PHP 7.0.10                                                      [ INFO ]
-Run security-checker                                                            [  OK  ]
-...
-```
-
-or on failure:
-
-```
-Run checks with PHP 5.6.25                                                      [ INFO ]
-Run security-checker                                                            [  OK  ]
-Check PSR2 codestyle                                                            [ FAIL ]
-Failed command: docker-compose run php-5.6 php bin/phpcs.phar --standard=PSR2 ./src -v[ FAIL ]
+$ make
 ```
 
 ## Source