dockerfile should configure JAVA_HOME

Author: ktoso

docker/Dockerfile

@@ -21,10 +21,10 @@ ENV LANGUAGE=en_US.UTF-8
 # JDK dependency
 RUN curl -s "https://get.sdkman.io" | bash
 RUN bash -c "source /root/.sdkman/bin/sdkman-init.sh && sdk install java 25.0.1-amzn"
+ENV JAVA_HOME="$(sdk home java current)"
 
 RUN curl -O https://download.swift.org/swiftly/linux/swiftly-$(uname -m).tar.gz && \
     tar zxf swiftly-$(uname -m).tar.gz && \
     ./swiftly init --quiet-shell-followup --assume-yes && \
     . "${SWIFTLY_HOME_DIR:-$HOME/.local/share/swiftly}/env.sh" && \
     hash -r
-