zammad: Installiere yarn zum Kompilieren der assets

tasks/packages.yml

@@ -29,10 +29,22 @@
       - libyaml-dev
       - locales
       - moreutils
-      - nginx-light
       - nodejs
       - patch
       - pkg-config
       - rbenv
       - sudo
+      - yarnpkg
       - zlib1g-dev
+
+# https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=940511
+- name: "packages | ensure cmdtest is not installed"
+  apt:
+    name: cmdtest
+    state: absent
+
+- name: "packages | Erstelle yarn-Symlink"
+  file:
+    src: /usr/bin/yarnpkg
+    dest: /usr/local/bin/yarn
+    state: link