devops: fixed backend files for deployment

backend/.env.example

@@ -1,6 +1,9 @@
 NODE_ENV=development
 APP_PORT=3000
 
+DATABASE_URL=
+DB_SSL=false
+
 POSTGRES_DB=neph_db
 POSTGRES_USER=neph_user
 POSTGRES_PASSWORD=neph_pass
@@ -14,4 +17,5 @@ SMTP_PORT=587
 SMTP_USER=your_gmail@gmail.com
 SMTP_PASS=your_gmail_app_password
 
-APP_URL=http://localhost:3000
+APP_URL=http://localhost:3000
+FRONTEND_URL=http://localhost:5173

backend/src/config/env.js

@@ -16,13 +16,15 @@ function readNumber(value, fallback) {
 
 const env = {
   nodeEnv: process.env.NODE_ENV || 'development',
-  appPort: readNumber(process.env.APP_PORT, 3000),
+  appPort: readNumber(process.env.APP_PORT || process.env.PORT, 3000),
   database: {
+    url: process.env.DATABASE_URL || '',
     host: process.env.POSTGRES_HOST || 'localhost',
     port: readNumber(process.env.POSTGRES_PORT, 5432),
     database: process.env.POSTGRES_DB || 'neph_db',
     user: process.env.POSTGRES_USER || 'neph_user',
     password: process.env.POSTGRES_PASSWORD || 'neph_pass',
+    ssl: (process.env.DB_SSL || 'false').toLowerCase() === 'true',
   },
   jwt: {
     secret: process.env.JWT_SECRET || 'dev-secret-123',

backend/src/db/pool.js

@@ -2,13 +2,21 @@ const { Pool } = require('pg');
 
 const { env } = require('../config/env');
 
-const pool = new Pool({
-  host: env.database.host,
-  port: env.database.port,
-  database: env.database.database,
-  user: env.database.user,
-  password: env.database.password,
-});
+const poolConfig = env.database.url
+  ? {
+      connectionString: env.database.url,
+      ssl: env.database.ssl ? { rejectUnauthorized: false } : undefined,
+    }
+  : {
+      host: env.database.host,
+      port: env.database.port,
+      database: env.database.database,
+      user: env.database.user,
+      password: env.database.password,
+      ssl: env.database.ssl ? { rejectUnauthorized: false } : undefined,
+    };
+
+const pool = new Pool(poolConfig);
 
 async function query(text, params = []) {
   return pool.query(text, params);