Per #1546, check return code of commands and exit non-zero if failure…

…. This was not needed in Dockerfile because the commands were chained together with &&, but in a script execution will continue after a failed command

scripts/docker/build_met_docker.sh

@@ -13,14 +13,24 @@ echo "Configuring MET ${MET_GIT_NAME} and writing log file ${LOG_FILE}"
     MET_FREETYPEINC=/usr/include/freetype2 MET_FREETYPELIB=/usr/lib \
     MET_CAIROINC=/usr/include/cairo MET_CAIROLIB=/usr/lib \
     MET_PYTHON_CC='-I/usr/include/python3.6m' MET_PYTHON_LD='-lpython3.6m' > ${LOG_FILE}
+if [ $? != 0 ]; then
+    exit 1
+fi
 
 LOG_FILE=/met/MET-${MET_GIT_NAME}/make_install.log
 echo "Compiling MET ${MET_GIT_NAME} and writing log file ${LOG_FILE}"
 make install > ${LOG_FILE}
+if [ $? != 0 ]; then
+    exit 1
+fi
 
 LOG_FILE=/met/logs/MET-${MET_GIT_NAME}_make_test.log
 echo "Testing MET ${MET_GIT_NAME} and writing log file ${LOG_FILE}"
 make test > ${LOG_FILE} 2>&1
+if [ $? != 0 ]; then
+    exit 1
+fi
+
 
 if [[ $MET_GIT_NAME == "v"* ]]; then
     cd /met; rm -rf MET-*;