Install jdk instead of jre so Java resolution actually works

Author: sweoggy

build/docker/alpine.Dockerfile

@@ -40,7 +40,7 @@ RUN wget https://services.gradle.org/distributions/gradle-$GRADLE_VERSION-bin.zi
 
 # g++ needed to compile python packages with C dependencies (numpy, scipy, etc.)
 RUN apk --no-cache --update add \
-  openjdk21-jre \
+  openjdk21-jdk \
   python3 \
   py3-scipy \
   py3-pip \

build/docker/debian.Dockerfile

@@ -98,7 +98,7 @@ RUN apt -y update && apt -y upgrade && apt -y install \
     python3.12\
     python3.12-venv \
     golang-$GOLANG_VERSION \
-    openjdk-21-jre && \
+    openjdk-21-jdk && \
     apt -y clean && rm -rf /var/lib/apt/lists/* && \
     # Symlink go binary to bin directory which is in path
     ln -s /usr/lib/go-$GOLANG_VERSION/bin/go /usr/bin/go