fix(docker): copy pnpm-workspace.yaml into the install layer

pnpm 11 defaults strictDepBuilds to true, so a dependency build script
that is not pre-decided in allowBuilds becomes a hard error. The install
layer only copied package.json and the lockfile, so the vue-demi build
decision in pnpm-workspace.yaml was absent and the build failed.

Dockerfile

@@ -1,6 +1,6 @@
 FROM node:22-alpine AS build
 WORKDIR /app
-COPY package.json pnpm-lock.yaml* ./
+COPY package.json pnpm-lock.yaml* pnpm-workspace.yaml ./
 RUN corepack enable && pnpm install --frozen-lockfile
 COPY . .
 RUN pnpm build