Docker update to Ubuntu 19.10 (#2577)

Released today with PHP 7.3.8, Apache 2.4.41
http://releases.ubuntu.com/eoan/

Docker/Dockerfile

@@ -1,4 +1,4 @@
-FROM ubuntu:19.04
+FROM ubuntu:19.10
 
 ENV TZ UTC
 SHELL ["/bin/bash", "-o", "pipefail", "-c"]

Docker/Dockerfile-QEMU-ARM

@@ -1,7 +1,7 @@
 # Only relevant for Docker Hub or QEMU multi-architecture builds.
 # Prefer the normal `Dockerfile` if you are building manually on the targeted architecture.
 
-FROM arm32v7/ubuntu:19.04
+FROM arm32v7/ubuntu:19.10
 
 # Requires ./hooks/*
 COPY ./Docker/qemu-arm-* /usr/bin/