Added code to take JWT secret from env file

Author: amitavroy

server/.env.example

@@ -1,3 +1,4 @@
+APP_SECRET=
 DB_HOST=localhost
 DB_PORT=3306
 DB_USERNAME=root

server/src/config/app.config.ts

@@ -0,0 +1,3 @@
+export default () => ({
+  appSecret: process.env.APP_SECRET,
+});

server/src/config/jwt.config.ts

@@ -0,0 +1,12 @@
+import { JwtModuleAsyncOptions } from '@nestjs/jwt';
+
+import appConfig from './app.config';
+
+export const jwtConfig: JwtModuleAsyncOptions = {
+  useFactory: () => {
+    return {
+      secret: appConfig().appSecret,
+      signOptions: { expiresIn: '1d' },
+    };
+  },
+};

server/src/modules/auth/auth.module.ts

@@ -6,16 +6,10 @@ import { UserModule } from '../user/user.module';
 import { PassportModule } from '@nestjs/passport';
 import { JwtModule } from '@nestjs/jwt';
 import { JwtStrategy } from './jwt.strategy';
+import { jwtConfig } from '../../config/jwt.config';
 
 @Module({
-  imports: [
-    UserModule,
-    PassportModule,
-    JwtModule.register({
-      secret: 'asdasghgfhgfh5355dfgfg345345',
-      signOptions: { expiresIn: '1d' },
-    }),
-  ],
+  imports: [UserModule, PassportModule, JwtModule.registerAsync(jwtConfig)],
   providers: [AuthService, LocalStrategy, JwtStrategy],
   controllers: [AuthController],
 })

server/src/modules/auth/jwt.strategy.ts

@@ -1,11 +1,12 @@
 import { PassportStrategy } from '@nestjs/passport';
 import { ExtractJwt, Strategy } from 'passport-jwt';
+import appConfig from '../../config/app.config';
 
 export class JwtStrategy extends PassportStrategy(Strategy) {
   constructor() {
     super({
       jwtFromRequest: ExtractJwt.fromAuthHeaderAsBearerToken(),
-      secretOrKey: 'asdasghgfhgfh5355dfgfg345345',
+      secretOrKey: appConfig().appSecret,
     });
   }