initialize project structure with essential files and configurations from ToneGuessr

Dockerfile

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+FROM node:20-alpine
+
+RUN npm install -g pnpm
+
+WORKDIR /app
+
+COPY --chown=node:node ./package.json ./pnpm-lock.yaml /app/
+COPY --chown=node:node ./client/package.json ./client/pnpm-lock.yaml /client/
+
+WORKDIR /client
+RUN NODE_ENV=development pnpm install
+
+COPY --chown=node:node ./server /app
+COPY --chown=node:node ./client /client
+
+RUN pnpm run build
+
+RUN cp -r /client/dist /app/dist
+
+WORKDIR /app
+RUN pnpm install --production --frozen-lockfile
+
+RUN chown -R node:node /app
+
+ENV NODE_ENV=production
+
+USER node
+EXPOSE 5287
+
+CMD ["node", "index.js"]