Make a Dockerfile in the root that can run this project, so that

Dockerfile

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+# ============================================================
+# Stage 1: Build the picoclaw binary
+# ============================================================
+FROM golang:1.25-alpine AS builder
+
+RUN apk add --no-cache git make
+
+WORKDIR /src
+
+# Cache dependencies
+COPY go.mod go.sum ./
+RUN go mod download
+
+# Copy source and build
+COPY . .
+RUN make build
+
+# ============================================================
+# Stage 2: Minimal runtime image
+# ============================================================
+FROM alpine:3.23
+
+RUN apk add --no-cache ca-certificates tzdata \
+    && addgroup -S picoclaw \
+    && adduser -S -G picoclaw -h /home/picoclaw picoclaw
+
+ENV HOME=/home/picoclaw
+ENV PICOCLAW_GATEWAY_HOST=0.0.0.0
+
+WORKDIR /home/picoclaw
+
+# Health check
+HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
+  CMD wget -q --spider http://localhost:18790/health || exit 1
+
+# Copy binary and first-run entrypoint.
+COPY --from=builder /src/build/picoclaw /usr/local/bin/picoclaw
+COPY docker/entrypoint.sh /entrypoint.sh
+RUN chmod +x /entrypoint.sh \
+    && mkdir -p /home/picoclaw/.picoclaw \
+    && chown -R picoclaw:picoclaw /home/picoclaw
+
+USER picoclaw
+
+VOLUME ["/home/picoclaw/.picoclaw"]
+EXPOSE 18790
+
+ENTRYPOINT ["/entrypoint.sh"]