Added server.js for Node lab
Added server.js for Node lab

goldshtn/linux-tracing-workshop,goldshtn/linux-tracing-workshop,goldshtn/linux-tracing-workshop,goldshtn/linux-tracing-workshop,goldshtn/linux-tracing-workshop,goldshtn/linux-tracing-workshop,goldshtn/linux-tracing-workshop,goldshtn/linux-tracing-workshop