feat: introduce gql schema sdl generation to the backend (#35)

* feat: introduce gql schema sdl generation to the backend

* chore: update gql-codegen consumers to get schema from generated sdl

* chore: hoppscotch-backend generates gql sdl on postinstall

* fix: add back missed part of generate-gql-sdl script

* chore: updated generate sdl script to hardcode whitelisted domains

* chore: add prisma generate on postinstall script

---------

Co-authored-by: ankitsridhar16 <ankit.sridhar16@gmail.com>

packages/hoppscotch-backend/package.json

@@ -8,6 +8,7 @@
   "scripts": {
     "prebuild": "rimraf dist",
     "build": "nest build",
+    "generate-gql-sdl": "cross-env GQL_SCHEMA_EMIT_LOCATION='../../../gql-gen/backend-schema.gql' GENERATE_GQL_SCHEMA=true WHITELISTED_ORIGINS='' nest start",
     "format": "prettier --write \"src/**/*.ts\" \"test/**/*.ts\"",
     "start": "nest start",
     "start:dev": "nest start --watch",
@@ -15,6 +16,7 @@
     "start:prod": "node dist/main",
     "lint": "eslint \"{src,apps,libs,test}/**/*.ts\" --fix",
     "test": "jest",
+    "postinstall": "prisma generate && pnpm run generate-gql-sdl",
     "test:watch": "jest --watch",
     "test:cov": "jest --coverage",
     "test:debug": "node --inspect-brk -r tsconfig-paths/register -r ts-node/register node_modules/.bin/jest --runInBand",
@@ -76,6 +78,7 @@
     "@types/supertest": "^2.0.12",
     "@typescript-eslint/eslint-plugin": "^5.45.0",
     "@typescript-eslint/parser": "^5.45.0",
+    "cross-env": "^7.0.3",
     "eslint": "^8.29.0",
     "eslint-config-prettier": "^8.5.0",
     "eslint-plugin-prettier": "^4.2.1",