Fix corepack integrity key check for public frontend Dockerfile

Relates to: nodejs/corepack#612

Author: ntsim

docker/public-frontend/Dockerfile

@@ -3,6 +3,7 @@ FROM node:20.16.0-alpine AS base
 ENV PNPM_HOME="/pnpm"
 ENV PATH="$PNPM_HOME:$PATH"
 
+RUN npm i -g corepack@latest
 RUN corepack enable
 
 WORKDIR /app