Added example compose for a tailscale deployment

docker/Dockerfile

@@ -0,0 +1,41 @@
+# syntax=docker/dockerfile:1.7
+
+# Build stage. Runs on the runner's native arch (BUILDPLATFORM) and
+# cross-compiles the Go binary for whichever target the manifest list
+# is being assembled for (TARGETOS/TARGETARCH). Keeps multi-arch
+# builds fast — only the final link is per-arch, the Go toolchain is
+# always native.
+FROM --platform=$BUILDPLATFORM golang:1.24-alpine AS builder
+ARG TARGETOS
+ARG TARGETARCH
+ARG VERSION=dev
+
+WORKDIR /src
+
+# Module cache layer — re-uses unless go.mod/go.sum change.
+COPY go.mod go.sum ./
+RUN go mod download
+
+COPY . .
+
+RUN CGO_ENABLED=0 GOOS=${TARGETOS} GOARCH=${TARGETARCH} \
+    go build \
+      -trimpath \
+      -ldflags "-s -w -X main.version=${VERSION}" \
+      -o /out/qu \
+      ./cmd/qu
+
+# Runtime stage. distroless/static has CA roots for HTTPS probes and
+# nothing else — no shell, no package manager. Runs as root so the
+# daemon can open ICMP sockets and write under /etc/quptime; operators
+# can override at deploy time with `docker run --user`.
+FROM gcr.io/distroless/static-debian12:latest
+
+COPY --from=builder /out/qu /usr/local/bin/qu
+
+ENV QUPTIME_DIR=/etc/quptime
+VOLUME ["/etc/quptime"]
+EXPOSE 9901
+
+ENTRYPOINT ["/usr/local/bin/qu"]
+CMD ["serve"]