TMSS-146: added nodejs and npm, and install npm dependency packages

Docker/lofar-ci/Dockerfile_ci_sas

@@ -6,5 +6,10 @@
 FROM ci_base:latest
 
 RUN echo "Installing packages for SAS..." && \
-    yum -y install postgresql-devel openldap-devel readline-devel qpid-cpp-server qpid-cpp-client-devel qpid-tools libpqxx-devel java-devel qt-devel autogen boost-python36-devel && \
+    yum -y install postgresql-devel openldap-devel readline-devel qpid-cpp-server qpid-cpp-client-devel qpid-tools libpqxx-devel java-devel qt-devel autogen boost-python36-devel nodejs npm && \
     pip3 install kombu psycopg2 requests lxml xmljson pygcn python-dateutil django djangorestframework djangorestframework-xml django-auth-ldap mysql-connector testing.mysqld testing.postgresql
+
+RUN npm install -g npx && \
+    npm install -g n && \
+    n stable && \
+    npm install -g serve