build: add frontend container image

web/Dockerfile

@@ -0,0 +1,13 @@
+FROM node:22-alpine AS build
+WORKDIR /app
+RUN corepack enable && corepack prepare pnpm@10.17.0 --activate
+COPY package.json pnpm-lock.yaml ./
+RUN pnpm install --frozen-lockfile
+COPY . .
+RUN pnpm build
+
+FROM nginx:1.28-alpine
+COPY nginx.conf /etc/nginx/conf.d/default.conf
+COPY --from=build /app/dist /usr/share/nginx/html
+EXPOSE 80
+CMD ["nginx", "-g", "daemon off;"]