fix(admin): use npm workspace in Docker

Align admin production and development images with the repository's committed npm workspace and lockfile. This ensures shared and Expo-linked dependencies are installed before the admin build runs.

apps/admin/Dockerfile.dev

@@ -2,34 +2,15 @@ FROM node:20-bookworm-slim
 
 WORKDIR /app
 
-# Enable pnpm via corepack (allow non-matching packageManager)
-ENV COREPACK_ENABLE_STRICT=0
-ENV PNPM_CONFIG_LINK_WORKSPACE_PACKAGES=true
-RUN corepack enable && corepack prepare pnpm@9.15.0 --activate
-
-# Copy root package files and workspace configs
-COPY package*.json ./
-COPY pnpm-workspace.yaml ./
-COPY turbo.json ./
-
-# Copy all workspace package.json files
-COPY apps/admin/package.json ./apps/admin/
-COPY apps/mobile/package.json ./apps/mobile/
-COPY apps/supabase/package.json ./apps/supabase/
-COPY apps/web/package.json ./apps/web/
-COPY packages/shared/package.json ./packages/shared/
-
-# Install all dependencies at root level (workspaces)
-RUN pnpm install --no-frozen-lockfile
-
-# Copy all source code
+# Install the complete npm workspace from its committed lockfile.
 COPY . .
+RUN npm ci
 
 # Build shared package
-RUN pnpm exec turbo run build --filter=@sauci/shared
+RUN npm run build -w @sauci/shared
 
 WORKDIR /app/apps/admin
 
 EXPOSE 3001
 
-CMD ["pnpm", "run", "dev"]
+CMD ["npm", "run", "dev"]