ci: restore Dockerfile used to run desktop tests

Author: kropp

ci/docker/desktop/Dockerfile

@@ -0,0 +1,7 @@
+FROM ubuntu:22.04
+
+ENV JAVA_HOME /usr/lib/jvm/java-17-openjdk-amd64
+ENV PATH $JAVA_HOME/bin:$PATH
+
+RUN apt update
+RUN DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends xvfb openjdk-17-jdk