fix(backend): resolve Docker build failures - Prisma config and Ethers imports

Author: Your Name

backend/package.json

@@ -5,7 +5,8 @@
   "main": "index.js",
   "scripts": {
     "build": "prisma generate && tsc",
-    "start": "node dist/index.js",
+    "start": "node dist/src/index.js",
+    "start:prod": "prisma db push && node dist/src/index.js",
     "dev": "tsx watch src/index.ts",
     "test": "NODE_ENV=test jest",
     "test:watch": "NODE_ENV=test jest --watch",
@@ -19,24 +20,24 @@
   "author": "",
   "license": "ISC",
   "dependencies": {
-    "@prisma/adapter-pg": "^6.7.0",
-    "@prisma/client": "^6.7.0",
+    "@prisma/adapter-pg": "^7.8.0",
+    "@prisma/client": "^7.8.0",
     "@stellar/stellar-sdk": "^14.6.1",
     "@types/ioredis": "^4.28.10",
     "@types/json2csv": "^5.0.7",
     "bcryptjs": "^3.0.2",
     "bullmq": "^5.76.1",
     "cors": "^2.8.6",
     "dotenv": "^17.3.1",
-    "ethers": "^6.16.0",
+    "ethers": "^5.8.0",
     "express": "^5.2.1",
     "express-rate-limit": "^8.3.1",
     "ioredis": "^5.10.1",
     "json2csv": "^6.0.0-alpha.2",
     "jsonwebtoken": "^9.0.2",
     "openai": "^6.32.0",
     "pg": "^8.20.0",
-    "prisma": "^6.7.0",
+    "prisma": "^7.8.0",
     "qrcode": "^1.5.4",
     "socket.io": "^4.8.3",
     "winston": "^3.19.0",

backend/prisma.config.ts

@@ -1,11 +1,7 @@
-// This file was generated by Prisma, and assumes you have installed the following:
-// npm install --save-dev prisma dotenv
-import 'dotenv/config';
+// This file was generated by Prisma - updated 2026-05-25
 import { defineConfig } from '@prisma/config';
 
-const connectionString =
-  process.env.DATABASE_URL ||
-  'file:./dev.db';
+const connectionString = process.env.DATABASE_URL || 'file:./dev.db';
 
 export default defineConfig({
   schema: 'prisma/schema.prisma',

backend/src/auth/web3.service.ts

@@ -60,7 +60,7 @@ export const verifySignature = async (
   nonce: string
 ): Promise<{ user: any; accessToken: string; refreshToken: string }> => {
   // Normalize wallet address
-  const normalizedAddress = ethers.getAddress(walletAddress);
+  const normalizedAddress = ethers.utils.getAddress(walletAddress);
 
   // Find and validate nonce
   const storedNonce = await prisma.authNonce.findFirst({