Add Dockerfiles and compose quickstart

frontend/Dockerfile

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+# syntax=docker/dockerfile:1
+
+FROM node:20-alpine AS deps
+WORKDIR /app
+
+COPY package.json package-lock.json ./
+RUN npm ci
+
+FROM node:20-alpine AS builder
+WORKDIR /app
+
+COPY --from=deps /app/node_modules ./node_modules
+COPY . ./
+
+# Allows configuring the API URL at build time.
+ARG NEXT_PUBLIC_API_URL=http://localhost:8000
+ENV NEXT_PUBLIC_API_URL=${NEXT_PUBLIC_API_URL}
+
+RUN npm run build
+
+FROM node:20-alpine AS runner
+WORKDIR /app
+
+ENV NODE_ENV=production
+
+# If provided at runtime, Next will expose NEXT_PUBLIC_* to the browser as well
+# (but note some values may be baked at build time).
+ENV NEXT_PUBLIC_API_URL=http://localhost:8000
+
+COPY --from=builder /app/.next ./.next
+COPY --from=builder /app/public ./public
+COPY --from=builder /app/package.json ./package.json
+COPY --from=builder /app/node_modules ./node_modules
+COPY --from=builder /app/next.config.ts ./next.config.ts
+
+EXPOSE 3000
+
+CMD ["npm", "run", "start"]