Add testing support for GraalVM's and OpenJ9 JVM.

Dockerfile.graalvm-jvm

@@ -0,0 +1,26 @@
+FROM ghcr.io/graalvm/native-image:latest as build
+
+WORKDIR /app/
+
+COPY . /app/
+
+RUN --mount=type=cache,target=/root/.gradle/caches/ \
+    ./gradlew shadowJar
+
+RUN jlink \
+    --add-modules java.base,java.logging,java.sql,java.management,java.xml,java.naming,java.desktop,jdk.crypto.ec \
+    --strip-debug \
+    --no-man-pages \
+    --no-header-files \
+    --compress=2 \
+    --output /javaruntime
+
+FROM debian:stable-slim
+
+ENV JAVA_HOME=/opt/java/openjdk
+ENV PATH "${JAVA_HOME}/bin:${PATH}"
+COPY --from=build /javaruntime $JAVA_HOME
+
+WORKDIR /app/
+
+COPY --from=build /app/build/libs/piped-1.0-all.jar .