Seperate lines and use full path to juliaup. Also export the juila path

Author: kmp5VT

jenkins/Dockerfile

@@ -12,6 +12,7 @@ RUN apt-get update && \
     rm -rf /var/lib/apt/lists/*
 
 #ARG JULIA=1.6
-RUN curl -fsSL https://install.julialang.org | sh -s -- --yes && \
-    juliaup add ${JULIA} && \
-    juliaup default ${JULIA}
+RUN curl -fsSL https://install.julialang.org | sh -s -- --yes
+RUN /root/.juliaup/bin/juliaup add ${JULIA} && \
+    /root/.juliaup/bin/juliaup default ${JULIA}
+RUN export PATH=/root/.juliaup/bin/:$PATH