refactor: removing Redis from pubsub in sh-backend (HBE-178) (#49)

* chore: removed production env check and redis as pubsub provider in pubsub module

* chore: removed pnpm-lock.yaml file from backend

* chore: removed migrations folder from prisma

* chore: removed RedisPubSub from pubsub service file and changed signature of asyncIterator method

packages/hoppscotch-backend/src/pubsub/pubsub.service.ts

@@ -1,33 +1,8 @@
 import { OnModuleInit } from '@nestjs/common';
 import { Injectable } from '@nestjs/common';
-import { default as Redis, RedisOptions } from 'ioredis';
-
-import { RedisPubSub } from 'graphql-redis-subscriptions';
 import { PubSub as LocalPubSub } from 'graphql-subscriptions';
 import { TopicDef } from './topicsDefs';
 
-/**
- * RedisPubSub uses JSON parsing for back and forth conversion, which loses Date objects, hence this reviver brings them back
- * This function implementation should function like the JSON.parse reviver function
- * @param key The key being parsed
- * @param value The value being parsed
- * @returns The updated value for the key
- */
-const dateReviver = (key: string, value: unknown) => {
-  const isISO8601Z =
-    /^(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2}):(\d{2}(?:\.\d*)?)Z$/;
-
-  if (typeof value === 'string' && isISO8601Z.test(value)) {
-    const tempDateNumber = Date.parse(value);
-
-    if (!isNaN(tempDateNumber)) {
-      return new Date(tempDateNumber);
-    }
-  }
-
-  return value;
-};
-
 /*
  * Figure out which PubSub to use (simple/local for dev and Redis for production)
  * and expose it
@@ -35,40 +10,16 @@ const dateReviver = (key: string, value: unknown) => {
 
 @Injectable()
 export class PubSubService implements OnModuleInit {
-  private pubsub: RedisPubSub | LocalPubSub;
+  private pubsub: LocalPubSub;
 
   onModuleInit() {
-    if (process.env.PRODUCTION === 'false') {
-      console.log('Initialize PubSub in development mode');
+    console.log('Initialize PubSub');
 
-      this.pubsub = new LocalPubSub();
-    } else {
-      console.log('Initialize PubSub in production mode');
-      console.log(
-        `REDIS_IP: ${process.env.REDIS_IP}, REDIS_PORT: ${process.env.REDIS_PORT}`,
-      );
-
-      const redisOptions: RedisOptions = {
-        port: parseInt(process.env.REDIS_PORT || '6379'),
-        host: process.env.REDIS_IP,
-        retryStrategy: (times: number) => {
-          return Math.min(times * 50, 2000);
-        },
-      };
-
-      this.pubsub = new RedisPubSub({
-        publisher: new Redis(redisOptions),
-        subscriber: new Redis(redisOptions),
-        reviver: dateReviver,
-      });
-    }
+    this.pubsub = new LocalPubSub();
   }
 
-  asyncIterator<T>(
-    topic: string | string[],
-    options?: unknown,
-  ): AsyncIterator<T> {
-    return this.pubsub.asyncIterator(topic, options);
+  asyncIterator<T>(topic: string | string[]): AsyncIterator<T> {
+    return this.pubsub.asyncIterator(topic);
   }
 
   async publish<T extends keyof TopicDef>(topic: T, payload: TopicDef[T]) {