ci: Switched multiarch-java8 to be based on adoptopenjdk:8-jre-hotspot

Dockerfile

@@ -1,11 +1,10 @@
-FROM ubuntu:18.04
+FROM adoptopenjdk:8-jre-hotspot
 
 LABEL org.opencontainers.image.authors="Geoff Bourne <itzgeoff@gmail.com>"
 
 RUN apt-get update \
   && DEBIAN_FRONTEND=noninteractive \
   apt-get install -y \
-    openjdk-8-jre-headless \
     imagemagick \
     gosu \
     sudo \

start-configuration

@@ -56,7 +56,7 @@ fi
 
 if ! which java > /dev/null; then
   log "Fixing PATH to include java"
-  PATH="${PATH}:/usr/bin"
+  PATH="${PATH}:/opt/java/openjdk/bin"
 fi
 
 export VERSIONS_JSON=https://launchermeta.mojang.com/mc/game/version_manifest.json