diff --git a/Dockerfile b/Dockerfile
deleted file mode 100644
index 2b4bed0..0000000
--- a/Dockerfile
+++ /dev/null
@@ -1,15 +0,0 @@
-FROM php:7.2-apache
-
-RUN sed -i "s/80/8080/g" /etc/apache2/sites-available/000-default.conf /etc/apache2/ports.conf
-
-COPY . /var/www/html/
-
-ENV REDIS_OPTIONS_SCHEMA "tcp"
-ENV REDIS_OPTIONS_HOST "localhost"
-ENV REDIS_OPTIONS_PORT "6379"
-ENV REDIS_OPTIONS_PASSWORD "changeme"
-
-ENV RETWIS_TITLE "Moin"
-
-EXPOSE 8080
-
diff --git a/composer.json b/composer.json
new file mode 100644
index 0000000..b08e7a2
--- /dev/null
+++ b/composer.json
@@ -0,0 +1,7 @@
+{
+    "require": {
+    },
+    "require-dev": {
+        "jakub-onderka/php-parallel-lint": "^1.0"
+    }
+}