Add production deployment guide and restrict CORS to development.

Document clearnet, TLS, and Tor setup; enable Nest CORS only in development and skip CORS_ORIGINS validation in production.

backend/src/main.ts

@@ -8,6 +8,7 @@ import { altchaMiddleware } from './middlewares/altchaMiddleware';
 import { AltchaService } from './modules/altcha/services/AltchaService';
 import { Config } from './types/config/Config';
 import { HttpMethod } from './types/HttpMethod';
+import { NodeEnv } from './types/NodeEnv';
 
 async function bootstrap() {
     const app = await NestFactory.create<NestExpressApplication>(AppModule, { bodyParser: false });
@@ -21,6 +22,7 @@ async function bootstrap() {
 
     const {
         port,
+        nodeEnv,
         corsOrigins,
         validation: {
             upload: { maxRequestBodyBytes }
@@ -52,10 +54,12 @@ async function bootstrap() {
         })
     );
 
-    app.enableCors({
-        origin: corsOrigins,
-        credentials: true
-    });
+    if (nodeEnv === NodeEnv.Development) {
+        app.enableCors({
+            origin: corsOrigins,
+            credentials: true
+        });
+    }
 
     app.set('trust proxy', 1);