Update Dockerfile for correct directory structure

Dockerfile

@@ -13,8 +13,8 @@ COPY . .
 # Change to the dify-main/docker directory
 WORKDIR /app/dify-main/docker
 
-# Copy the example environment file from the correct location
-RUN cp .env.example .env
+# Correct the path to the .env.example file
+RUN cp /docker/.env.example .env
 
 # Run Docker Compose to build and start the services
 CMD ["docker-compose", "up", "-d"]