fix: correct package manager for the live demo

Author: yaroslav8765

live-demo/app/Dockerfile

@@ -1,7 +1,7 @@
 FROM node:20-alpine
 WORKDIR /code/
 ADD package.json pnpm-lock.yaml pnpm-workspace.yaml /code/
-RUN npm i -g corepack@0.31.0
+RUN pnpm i -g corepack@0.31.0
 RUN corepack enable
 RUN pnpm i  
 ADD . /code/