Initialisation

Added the packages and files for the backend server

node_modules/@apollo/protobufjs/cli/pbts.d.ts

@@ -0,0 +1,9 @@
+type pbtsCallback = (err: Error|null, output?: string) => void;
+
+/**
+ * Runs pbts programmatically.
+ * @param {string[]} args Command line arguments
+ * @param {function(?Error, string=)} [callback] Optional completion callback
+ * @returns {number|undefined} Exit code, if known
+ */
+export function main(args: string[], callback?: pbtsCallback): number|undefined;