Merge branch 'develop' into staging

* develop:
  update base image

Dockerfile

@@ -1,4 +1,4 @@
-FROM kerstinsieren/alpine-phpfpm-nginx-baseimage:php74-20
+FROM kerstinsieren/alpine-phpfpm-nginx-baseimage:php74-21
 ENV TZ=Europe/Berlin
 
 WORKDIR /var/www/html