Refactor environment variable handling in frontend setup

docker-compose.yml

@@ -22,8 +22,8 @@ services:
     container_name: frontend
     volumes:
       - ./frontend.env:/app/.env  # Mount it as .env at runtime
-    env_file:
+#    env_file:
-      - ./frontend.env
+#      - ./frontend.env
     ports:
       - "5100:3000"
     restart: on-failure

frontend/Dockerfile

@@ -13,9 +13,6 @@ RUN npm ci
 # Copy entire project
 COPY . .
 
-# Create a .env file before build
-RUN echo "NEXT_PUBLIC_HCAPTCHA_SITE_KEY=$HCAPTCHA_SITE_KEY" > .env
-
 # Build the Next.js app
 RUN npm run build