INFRA-541 Simplified Cuppa Dockerfile

Had tried to get this working more like we do with Pipeline5's imager
scripts but this approach is much cleaner, it does appear to work but
want to try it on production data on the data-vm-prod-2 instance.

cuppa/Dockerfile

@@ -2,7 +2,10 @@ FROM openjdk:17-slim
 
 ARG VERSION
 RUN mkdir -p /usr/share/hartwig /opt/tools
+RUN apt update && apt install -y python3 python3-pip
+
 ADD target/cuppa-$VERSION-jar-with-dependencies.jar /usr/share/hartwig/cuppa.jar
 RUN cd /opt/tools && jar xvf /usr/share/hartwig/cuppa.jar pycuppa 
+RUN pip3 install --upgrade pip && pip3 install /opt/tools/pycuppa
 
 ENTRYPOINT ["java", "-cp", "/usr/share/hartwig/cuppa.jar", "com.hartwig.hmftools.cup.prep.CuppaDataPrep"]