Add sniffer for Symfony.

Stolexiy · andypost · commit 8a80a95fa6e9 · 2018-06-11T17:22:41.000+03:00
diff --git a/symfony/Dockerfile b/symfony/Dockerfile
@@ -0,0 +1,6 @@
+FROM skilldlabs/docker-phpcs-drupal:latest
+
+RUN composer global require escapestudios/symfony2-coding-standard:~2.0 \
+    && ln -s /root/.composer/vendor/escapestudios/symfony2-coding-standard/Symfony2 /root/.composer/vendor/squizlabs/php_codesniffer/CodeSniffer/Standards/Symfony2
+
+CMD ["phpcs", "--standard=Symfony2", "."]
