feat(ui): add wedding theme styles and layout components

* Introduced wedding-themed CSS variables for styling.
* Created layout component for the wedding site with navigation and countdown.
* Added RSVP and photo upload pages with form handling.
* Implemented QR code page for wedding site access.
* Configured TypeScript and Vite for the project.
* Added robots.txt for search engine crawling.

Dockerfile

@@ -0,0 +1,23 @@
+# syntax=docker/dockerfile:1
+
+FROM node:20-alpine AS frontend-builder
+WORKDIR /app/ui
+COPY ui/package*.json ./
+RUN npm ci
+COPY ui/ ./
+RUN npm run build
+
+FROM golang:1.26-alpine AS backend-builder
+WORKDIR /app
+COPY server/go.mod server/go.sum ./
+RUN go mod download
+COPY server/ ./
+COPY --from=frontend-builder /app/ui/build ./web/dist
+RUN CGO_ENABLED=0 go build -o /wedding-server .
+
+FROM alpine:3.20
+RUN apk add --no-cache ca-certificates
+COPY --from=backend-builder /wedding-server /usr/local/bin/wedding-server
+WORKDIR /app
+EXPOSE 8080
+ENTRYPOINT ["wedding-server"]