tomcat:8.5-slim lack of linux/arm64

[chanjarster]

tomcat:8.5 and tomcat:8.5-alpine support linux/arm64 but tomcat:8.5-slim does not support linux/arm64

[tianon]

Unfortunately, there are currently no supported Alpine variants of the tomcat image (because there are currently no supported Alpine variants of the various Java implementations).

Also, I do not believe that tomcat:8.5-slim is a supported tag -- I think what you want instead is something like tomcat:8.5-jdk8-openjdk-slim-buster or tomcat:8.5-jdk11-openjdk-slim-buster.