carddav plugin

dockerfile

@@ -0,0 +1,17 @@
+FROM roundcube/roundcubemail:latest-apache
+
+ENV COMPOSER_ALLOW_SUPERUSER=1
+
+RUN set -ex; \
+    apt-get update; \
+    apt-get -y upgrade; \
+    composer \
+    --working-dir=/usr/src/roundcubemail/ \
+    --prefer-dist \
+    --prefer-stable \
+    --update-no-dev \
+    --no-interaction \
+    --optimize-autoloader \
+    require roundcube/carddav ;
+
+