Update Dockerfile

Dockerfile

@@ -1,10 +1,7 @@
 FROM node:18
 RUN git clone https://github.com/Yidadaa/ChatGPT-Next-Web.git
 WORKDIR "ChatGPT-Next-Web"
-RUN npm i # 推荐使用 pnpm i
+RUN npm i 
 RUN npm run build
-# 设置环境变量，此处为随机字符
-ENV BASE_URL="https://ai.fakeopen.com"
-ENV OPENAI_API_KEY="pk-this-is-a-real-free-pool-token-for-everyone"
 EXPOSE 3000
 CMD ["npm", "run", "start"]