fix: added GAMSPY License arg to dockerfile to fix deployment issue

Author: koalamitice

Dockerfile

@@ -56,6 +56,7 @@ COPY --from=builder /app/build/jre /opt/java
 ENV PATH="${PATH}:/opt/java/bin"
 
 # Install the toolbox server and its solver scripts
+ARG GAMSPY_LICENSE
 COPY solvers solvers
 COPY demonstrators demonstrators
 RUN scripts/ci-setup-solvers.sh