npm package dependencies & initialization

npmPackage.js

// npm packages & initialization
const grpc = require("grpc");
const fs = require("fs");
const jsforce = require("jsforce");
const avro = require("avro-js");

const protoLoader = require("@grpc/proto-loader");
const packageDef = protoLoader.loadSync("sf.proto", {});
const grpcObj = grpc.loadPackageDefinition(packageDef);
const sfdcPackage = grpcObj.eventbus.v1;
const root_cert = fs.readFileSync("roots.cer");