register and sign in pages

.build/prod/web.Dockerfile

@@ -0,0 +1,19 @@
+# The SPA is built with node here and shipped as static files.
+# The runtime image is nginx only - no node, no bun.
+FROM node:22-slim AS builder
+
+WORKDIR /app
+
+COPY frontend/package.json frontend/package-lock.json ./
+RUN npm ci
+
+COPY frontend/ .
+RUN npm run build
+
+# ---- runtime ----
+FROM nginx:1.27-alpine
+
+COPY .build/prod/nginx.conf /etc/nginx/conf.d/default.conf
+COPY --from=builder /app/dist /usr/share/nginx/html
+
+EXPOSE 80