feat: ship Barkstack UI plugin

Dockerfile

@@ -1,4 +1,11 @@
 # syntax=docker/dockerfile:1.7
+FROM oven/bun:1.4.0-alpine AS ui
+WORKDIR /src/ui
+COPY ui/package.json ui/bun.lock ./
+RUN bun install --frozen-lockfile
+COPY ui ./
+RUN bun run build
+
 FROM golang:1.24-alpine AS build
 WORKDIR /src
 RUN apk add --no-cache git
@@ -6,10 +13,12 @@ COPY go.mod go.sum ./
 RUN go mod download
 COPY cmd ./cmd
 COPY internal ./internal
+COPY --from=ui /src/internal/adminui/dist ./internal/adminui/dist
 RUN CGO_ENABLED=0 go build -trimpath -ldflags='-s -w' -o /pawsql ./cmd/pawsql
 
 FROM alpine:3.21
 RUN apk add --no-cache ca-certificates docker-cli
 COPY --from=build /pawsql /usr/local/bin/pawsql
+EXPOSE 5432
 ENTRYPOINT ["/usr/local/bin/pawsql"]
-CMD ["--config", "/etc/pawsql/Barkfile"]
+CMD ["--config", "/etc/pawsql/Barkfile", "--admin-listen", ":9090"]