fix: Make Swagger server URLs fully configurable

- Add configurable server URL from API_BASE_URL env var
- Make production server optional via PRODUCTION_API_URL env var
- Remove hardcoded https://api.goagel.gov.in
- Document PRODUCTION_API_URL in .env.example

backend/src/main.ts

@@ -87,7 +87,7 @@ async function bootstrap(): Promise<void> {
 
   // Swagger documentation
   if (swaggerEnabled) {
-    const swaggerConfig = new DocumentBuilder()
+    const swaggerBuilder = new DocumentBuilder()
       .setTitle('Goa GEL API')
       .setDescription('Blockchain Document Verification Platform for Government of Goa')
       .setVersion('1.0.0')
@@ -110,7 +110,15 @@ async function bootstrap(): Promise<void> {
         'ApiKeyAuth',
       )
       .addServer(`http://localhost:${port}`, 'Local Development')
-      .addServer('https://api.goagel.gov.in', 'Production')
+      .addServer(process.env.API_BASE_URL?.replace('/api/v1', '') || `http://localhost:${port}`, 'Configured Server');
+
+    // Add production server only if configured
+    const productionApiUrl = process.env.PRODUCTION_API_URL;
+    if (productionApiUrl) {
+      swaggerBuilder.addServer(productionApiUrl, 'Production');
+    }
+
+    const swaggerConfig = swaggerBuilder
       .addTag('Auth', 'Authentication and authorization')
       .addTag('Applicants', 'Applicant management')
       .addTag('Requests', 'License request operations')