Update docker test runner

Author: olivervogel

Dockerfile

@@ -12,3 +12,7 @@ RUN apt update \
 
 # install composer
 COPY --from=composer /usr/bin/composer /usr/bin/composer
+
+# setup entrypoint
+COPY entrypoint.sh /usr/local/bin/entrypoint.sh
+ENTRYPOINT ["/usr/local/bin/entrypoint.sh"]

docker-compose.yml

@@ -4,6 +4,6 @@ services:
   tests:
     build: ./
     working_dir: /project
-    command: bash -c "composer install && ./vendor/bin/phpunit"
+    entrypoint: ["/usr/local/bin/entrypoint.sh", "./vendor/bin/phpunit"]
     volumes:
       - ./:/project

entrypoint.sh

@@ -0,0 +1,6 @@
+#!/bin/sh
+set -e
+
+composer install --quiet
+
+exec "$@"