Docker Foundations·Practice drills 7

Drill 16: Compare — Health checks and restart policies

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Beginner 5 min read Lesson 164 of 300 Challenge included
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DockerfileDockerfile
FROM node:22-alpine
WORKDIR /app
COPY package*.json ./
RUN npm ci --omit=dev
COPY . .
EXPOSE 3000
HEALTHCHECK --interval=30s --timeout=3s --retries=3 CMD wget -qO- http://localhost:3000/health || exit 1
CMD ["node", "server.js"]
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Lesson 164 of 300 · 0% of course