chore: server using pnpm instead of npm

Author: andrii-harbour

demo/server/Dockerfile

@@ -2,12 +2,12 @@ FROM node:20-alpine
 
 WORKDIR /app
 
-COPY package*.json ./
-RUN npm install --omit=dev
+COPY package.json ./
+RUN corepack enable && pnpm install --prod --no-lockfile
 
 COPY . .
 
 # Cloud Run/Functions set PORT; default to 8080
 ENV PORT=8080
 
-CMD ["npm", "start"]
+CMD ["pnpm", "start"]