diff --git a/README.md b/README.md
index 43e8019..5641571 100644
--- a/README.md
+++ b/README.md
@@ -284,9 +284,9 @@ qr-master/
 
 | Variable                             | Description                   | Required | Default                                                                |
 | ------------------------------------ | ----------------------------- | -------- | ---------------------------------------------------------------------- |
-| `DATABASE_URL`                       | PostgreSQL connection string  | Yes      | `postgresql://postgres:postgres@localhost:5435/qrmaster?schema=public` |
+| `DATABASE_URL`                       | PostgreSQL connection string  | Yes      | -                                                                      |
 | `NEXTAUTH_URL`                       | Application URL               | Yes      | `http://localhost:3050`                                                |
-| `NEXTAUTH_SECRET`                    | Secret for JWT encryption     | Yes      | Generate with `openssl rand -base64 32`                                |
+| `NEXTAUTH_SECRET`                    | Secret for JWT encryption     | Yes      | - (Generate with `openssl rand -base64 32`)                            |
 | `IP_SALT`                            | Salt for IP hashing (privacy) | Yes      | Generate with `openssl rand -base64 32`                                |
 | `GOOGLE_CLIENT_ID`                   | Google OAuth client ID        | No       | -                                                                      |
 | `GOOGLE_CLIENT_SECRET`               | Google OAuth client secret    | No       | -                                                                      |
diff --git a/docker-compose.dev.yml b/docker-compose.dev.yml
index 3321cc0..1de3e58 100644
--- a/docker-compose.dev.yml
+++ b/docker-compose.dev.yml
@@ -5,9 +5,9 @@ services:
     container_name: qrmaster-db-dev
     restart: unless-stopped
     environment:
-      POSTGRES_USER: postgres
-      POSTGRES_PASSWORD: postgres
-      POSTGRES_DB: qrmaster
+      POSTGRES_USER: ${POSTGRES_USER}
+      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD}
+      POSTGRES_DB: ${POSTGRES_DB}
       POSTGRES_INITDB_ARGS: "-E UTF8 --locale=en_US.utf8"
     ports:
       - "5435:5432"
diff --git a/docker-compose.yml b/docker-compose.yml
index 58d5efd..d613811 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -5,9 +5,9 @@ services:
     container_name: qrmaster-db
     restart: unless-stopped
     environment:
-      POSTGRES_USER: ${POSTGRES_USER:-postgres}
-      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD:-postgres}
-      POSTGRES_DB: ${POSTGRES_DB:-qrmaster}
+      POSTGRES_USER: ${POSTGRES_USER}
+      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD}
+      POSTGRES_DB: ${POSTGRES_DB}
       POSTGRES_INITDB_ARGS: "-E UTF8 --locale=en_US.utf8"
     ports:
       - "5435:5432"
@@ -50,12 +50,12 @@ services:
     ports:
       - "3050:3000"
     environment:
-      NODE_ENV: production
-      DATABASE_URL: postgresql://${POSTGRES_USER:-postgres}:${POSTGRES_PASSWORD:-postgres}@db:5432/${POSTGRES_DB:-qrmaster}?schema=public
-      DIRECT_URL: postgresql://${POSTGRES_USER:-postgres}:${POSTGRES_PASSWORD:-postgres}@db:5432/${POSTGRES_DB:-qrmaster}?schema=public
+       NODE_ENV: production
+      DATABASE_URL: postgresql://${POSTGRES_USER}:${POSTGRES_PASSWORD}@db:5432/${POSTGRES_DB}?schema=public
+      DIRECT_URL: postgresql://${POSTGRES_USER}:${POSTGRES_PASSWORD}@db:5432/${POSTGRES_DB}?schema=public
       REDIS_URL: redis://redis:6379
-      NEXTAUTH_URL: ${NEXTAUTH_URL:-http://localhost:3050}
-      NEXTAUTH_SECRET: ${NEXTAUTH_SECRET:-your-secret-key-change-in-production}
+      NEXTAUTH_URL: ${NEXTAUTH_URL}
+      NEXTAUTH_SECRET: ${NEXTAUTH_SECRET}
       NEXT_PUBLIC_APP_URL: ${NEXT_PUBLIC_APP_URL:-http://localhost:3050}
       IP_SALT: ${IP_SALT:-your-salt-change-in-production}
       ENABLE_DEMO: ${ENABLE_DEMO:-false}
diff --git a/env.example b/env.example
index db3ca84..5111f46 100644
--- a/env.example
+++ b/env.example
@@ -3,6 +3,10 @@ NODE_ENV=development
 PORT=3000
 
 # Database Configuration (PostgreSQL)
+POSTGRES_USER=postgres
+POSTGRES_PASSWORD=postgres
+POSTGRES_DB=qrmaster
+
 # For local development (without Docker):
 # DATABASE_URL=postgresql://postgres:postgres@localhost:5435/qrmaster?schema=public
 # For Docker Compose (internal Docker network):
diff --git a/scripts/setup.ps1 b/scripts/setup.ps1
index 9e491de..0b11297 100644
--- a/scripts/setup.ps1
+++ b/scripts/setup.ps1
@@ -87,7 +87,7 @@ switch ($choice) {
         Write-Host "Access points:"
         Write-Host "  - App: http://localhost:3050"
         Write-Host "  - Database UI: http://localhost:8080"
-        Write-Host "  - Database: localhost:5432"
+        Write-Host "  - Database: localhost:5435"
         Write-Host "  - Redis: localhost:6379"
     }
     "2" {
@@ -115,7 +115,7 @@ switch ($choice) {
         Write-Host ""
         Write-Host "Access points:"
         Write-Host "  - App: http://localhost:3050"
-        Write-Host "  - Database: localhost:5432"
+        Write-Host "  - Database: localhost:5435"
         Write-Host "  - Redis: localhost:6379"
         Write-Host ""
         Write-Host "To view logs:"
diff --git a/scripts/setup.sh b/scripts/setup.sh
index a911988..0ad43b3 100644
--- a/scripts/setup.sh
+++ b/scripts/setup.sh
@@ -98,7 +98,7 @@ case $choice in
         echo "Access points:"
         echo "  - App: http://localhost:3050"
         echo "  - Database UI: http://localhost:8080"
-        echo "  - Database: localhost:5432"
+        echo "  - Database: localhost:5435"
         echo "  - Redis: localhost:6379"
         ;;
     2)
@@ -126,7 +126,7 @@ case $choice in
         echo ""
         echo "Access points:"
         echo "  - App: http://localhost:3050"
-        echo "  - Database: localhost:5432"
+        echo "  - Database: localhost:5435"
         echo "  - Redis: localhost:6379"
         echo ""
         echo "To view logs:"
diff --git a/src/lib/env.ts b/src/lib/env.ts
index 088cdf1..3611081 100644
--- a/src/lib/env.ts
+++ b/src/lib/env.ts
@@ -3,7 +3,7 @@ import { z } from 'zod';
 const envSchema = z.object({
   NODE_ENV: z.enum(['development', 'production', 'test']).default('development'),
   PORT: z.string().default('3000'),
-  DATABASE_URL: z.string().default('postgresql://postgres:postgres@localhost:5432/qrmaster?schema=public'),
+  DATABASE_URL: z.string(),
   NEXTAUTH_URL: z.string().default('http://localhost:3050'),
   NEXTAUTH_SECRET: z.string().default('development-secret-change-in-production'),
   GOOGLE_CLIENT_ID: z.string().optional(),
diff --git a/src/middleware.ts b/src/middleware.ts
index 5f50c30..269266e 100644
--- a/src/middleware.ts
+++ b/src/middleware.ts
@@ -23,6 +23,10 @@ export function middleware(req: NextRequest) {
     '/barcode-generator',
     '/custom-qr-code-generator',
     '/manage-qr-codes',
+    '/coupon',
+    '/feedback',
+    '/vcard',
+    '/display',
   ];
 
   // Check if path is public