add:deploy stuff

frontend/Dockerfile

@@ -0,0 +1,31 @@
+FROM oven/bun:1-alpine AS builder
+
+WORKDIR /app
+
+COPY package.json ./
+COPY index.html ./
+COPY tsconfig*.json ./
+COPY vite.config.ts ./
+COPY src/ ./src/
+COPY public/ ./public/
+
+# VITE_API_URL must be set at build time — Vite bakes it into the bundle
+ARG VITE_API_URL
+ENV VITE_API_URL=$VITE_API_URL
+
+RUN bun install --frozen-lockfile
+RUN bun run build
+
+# ---- serve ----
+FROM oven/bun:1-alpine
+
+WORKDIR /app
+
+COPY --from=builder /app/node_modules ./node_modules
+COPY --from=builder /app/dist ./dist
+COPY --from=builder /app/package.json ./
+COPY --from=builder /app/vite.config.ts ./
+
+EXPOSE 4501
+
+CMD ["bun", "run", "node_modules/.bin/vite", "preview", "--host", "0.0.0.0", "--port", "4501"]