Précrée le dossier "public/" en CI.

prezbuilder-ci.yml

@@ -10,6 +10,8 @@
   image:
     name: "${PREZBUILDER_IMAGE}:${PREZBUILDER_TAG}"
     entrypoint: [""]
+  before_script:
+    - mkdir -p public
   script:
     - prezbuilder build "${PREZBUILDER_SRC}" public
   artifacts: