feature: add tslint script, add tsconfig.spec

package.json

@@ -4,12 +4,13 @@
   "description": "Nest TypeScript starter repository",
   "license": "MIT",
   "scripts": {
-    "format": "prettier --write \"**/*.ts\"",
+    "format": "prettier --write \"src/**/*.ts\"",
     "start": "ts-node -r tsconfig-paths/register src/main.ts",
     "start:dev": "nodemon",
     "prestart:prod": "rm -rf dist && tsc",
     "start:prod": "node dist/main.js",
     "start:hmr": "node dist/server",
+    "lint": "tslint -p tsconfig.json -c tslint.json",
     "test": "jest",
     "test:cov": "jest --coverage",
     "test:e2e": "jest --config ./test/jest-e2e.json",