Begin on devops

backend/.dockerignore

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+node_modules
+dockerfile

backend/dockerfile

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+FROM node:lts-alpine
+WORKDIR /app
+RUN corepack enable && corepack prepare pnpm@latest --activate
+COPY package.json pnpm-*.yaml ./
+RUN pnpm install --frozen-lockfile
+COPY . .
+EXPOSE 3000
+CMD [ "pnpm", "start" ]