replace yarn with pnpm

frontend/Dockerfile

@@ -1,19 +1,22 @@
-FROM node:alpine as build
+FROM node:alpine as base
-
+ENV PNPM_HOME="/pnpm"
+ENV PATH="$PNPM_HOME:$PATH"
+RUN corepack enable
+COPY . /app
 WORKDIR /app
-COPY . .
+
-RUN yarn
+FROM base AS prod-deps
-ENV BODY_SIZE_LIMIT=0
+RUN --mount=type=cache,id=pnpm,target=/pnpm/store pnpm install --prod --frozen-lockfile
-RUN yarn build
+
-RUN ls -al
+FROM base AS build
-
+RUN --mount=type=cache,id=pnpm,target=/pnpm/store pnpm install --frozen-lockfile
-FROM node:alpine as production
-
 ENV BODY_SIZE_LIMIT=0
+RUN pnpm run build
 
+FROM base
 WORKDIR /app
-COPY --from=build /app/package.json ./
+ENV BODY_SIZE_LIMIT=0
-COPY --from=build /app/build/ ./
+COPY --from=prod-deps /app/node_modules /app/node_modules
-RUN yarn --production
+COPY --from=build /app/build ./
 EXPOSE 3000
 CMD [ "node",  "index.js"]