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kimnTai
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# 選擇 Node.js 的基礎映像檔
FROM node:20-alpine
# 設置工作目錄,WORKDIR 是 Dockerfile 的指令,用來設置在容器內部用於存儲應用程式檔案的目錄。
WORKDIR /app
COPY . .
# 安裝套件
# RUN 指令用於在映像檔構建階段執行命令,並創建新的層。每個 RUN 指令都會在當前映像檔的頂部創建一個新的層並提交更改,進而形成新的映像檔。
RUN npm install
RUN npm run build
# 暴露應用程式所使用的端口
EXPOSE 3005
# 設定多個環境變數
ENV PORT=3005 \
NODE_ENV=production
# 啟動您的應用程式
# CMD 指令用於指定一個容器啟動時需要執行的命令。每個 Dockerfile 只能包含一個 CMD 指令。
# 總結來說,RUN 是在構建映像檔時執行的命令,而 CMD 是在容器啟動時執行的命令。
CMD ["npm","start"]
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