Dockerfile: use OpenJDK 17 and Ruby 3.2

The base `ruby` image dropped Debian 10 ("buster") images and converted
them to Debian 12 ("bookworm") - see
<docker-library/ruby#415>. However, while
OpenJDK 11 was available in "buster", it is no longer available in
"bookworm", so we now have to use OpenJDK 17 instead.

Author: generalmimon

Dockerfile

@@ -1,11 +1,11 @@
-FROM ruby
+FROM ruby:3.2
 
 # Download Kaitai Struct compiler deb
 RUN curl -fsSLO https://github.com/kaitai-io/kaitai_struct_compiler/releases/download/0.10/kaitai-struct-compiler_0.10_all.deb
 
 # Install it + Java + cleanup
 RUN apt-get update \
-       && apt-get -y install openjdk-11-jre-headless \
+       && apt-get -y install openjdk-17-jre-headless \
        && apt-get -y install ./kaitai-struct-compiler_0.10_all.deb \
        && rm -rf /var/lib/apt/lists/* ./kaitai-struct-compiler_0.10_all.deb