fix sonarkube concerns

Author: gilesknap

client/Dockerfile

@@ -2,11 +2,11 @@ FROM ghcr.io/epics-containers/epics-base-developer:7.0.9ec5 AS recsync-base
 
 WORKDIR /recsync
 COPY . /recsync/
-RUN ln -s /epics/support/configure/RELEASE configure/RELEASE.local
-RUN make
+RUN ln -s /epics/support/configure/RELEASE configure/RELEASE.local && \
+    make
 
 FROM recsync-base AS ioc-runner
 
 WORKDIR /recsync/bin/${EPICS_HOST_ARCH}
 
-CMD ./demo /recsync/iocBoot/iocdemo/st.cmd
+CMD ["./demo", "/recsync/iocBoot/iocdemo/st.cmd"]