Docker Alpine 3.20 (#6477)

https://alpinelinux.org/posts/Alpine-3.20.0-released.html
Moving from PHP 8.2.19 to PHP 8.3.7, still with Apache/2.4.59

.devcontainer/Dockerfile

@@ -1,4 +1,4 @@
-FROM alpine:3.18
+FROM alpine:3.20
 
 ENV TZ UTC
 SHELL ["/bin/ash", "-eo", "pipefail", "-c"]

Docker/Dockerfile-Alpine

@@ -1,4 +1,4 @@
-FROM alpine:3.19
+FROM alpine:3.20
 
 ENV TZ UTC
 SHELL ["/bin/ash", "-eo", "pipefail", "-c"]