chore: add dockerimage that was very helpful in debugging

for validating OS differences in jdk-logger

Author: simschla

Dockerfile

@@ -0,0 +1,22 @@
+# Description: A minimal Dockerfile for running/building spotless-cli and tests in a GraalVM environment.
+# --- Stage 1: Build/Install GraalVM ---
+FROM ghcr.io/graalvm/graalvm-community:21.0.2 AS graalvm-builder
+
+# --- Stage 2: Minimal Runtime Image ---
+FROM ubuntu:22.04
+
+# System packages you need at runtime
+RUN apt-get update && \
+    apt-get install -y \
+      libssl-dev \
+      libc6 \
+      npm \
+    && rm -rf /var/lib/apt/lists/*
+
+# Copy GraalVM from the first stage
+COPY --from=graalvm-builder /opt/graalvm-community-java21 /opt/graalvm
+
+# Set up environment
+ENV GRAALVM_HOME=/opt/graalvm
+ENV PATH="${GRAALVM_HOME}/bin:${PATH}"
+