🚀 use temurin jdk

Dockerfile

@@ -3,14 +3,27 @@
 # tier 2: more runtimes such as kotlin, java, csharp, etc..
 # tier 3: rarely used languages like brainfuck, whitespace, moo, ...
 
-FROM --platform=${BUILDPLATFORM} debian:bookworm AS tier-1
+FROM --platform=${BUILDPLATFORM} debian:bookworm-slim AS base
 
 ARG DEBIAN_FRONTEND=noninteractive
-RUN echo 'deb http://deb.debian.org/debian bookworm-backports main\n' >> /etc/apt/sources.list
-RUN echo 'deb http://deb.debian.org/debian bullseye main' >> /etc/apt/sources.list
-RUN apt update && apt install -y gcc-13 python3.11 python2.7 clang-15 fpc pypy3 && rm -rf /var/lib/apt/lists/*
+
+RUN apt update && apt install -y --no-install-recommends wget apt-transport-https ca-certificates
+
+RUN mkdir -p /etc/apt/keyrings
+RUN wget -O - https://packages.adoptium.net/artifactory/api/gpg/key/public | tee /etc/apt/keyrings/adoptium.asc
+
+COPY igloo-runner.list /etc/apt/sources.list.d/igloo-runner.list
+
+RUN apt clean
+
+FROM --platform=${BUILDPLATFORM} base AS tier-1
+
+ARG DEBIAN_FRONTEND=noninteractive
+
+RUN apt update && apt install --no-install-recommends -y gcc-12 python3.11 python2.7 clang-15 fpc pypy3
 
 FROM --platform=${BUILDPLATFORM} tier-1 AS tier-2
 
 ARG DEBIAN_FRONTEND=noninteractive
-RUN apt update && apt install -y golang-1.21-go mono-runtime openjdk-17-jdk openjdk-11-jdk openjdk-8-jdk ruby3.1 && rm -rf /var/lib/apt/lists/*
+
+RUN apt update && apt install --no-install-recommends -y golang-1.21-go mono-runtime temurin-21-jdk temurin-17-jdk temurin-11-jdk temurin-8-jdk ruby3.1

igloo-runner.list

@@ -0,0 +1,3 @@
+deb http://deb.debian.org/debian bookworm-backports main
+deb http://deb.debian.org/debian bullseye main
+deb [signed-by=/etc/apt/keyrings/adoptium.asc] https://packages.adoptium.net/artifactory/deb bookworm main