Update Dockerfile

Dockerfile

@@ -1,23 +1,25 @@
-# 阶段1: 构建前端
+FROM alpine:3.21 AS source
+RUN apk add --no-cache git
+WORKDIR /app
+RUN git clone --depth=1 https://github.com/AmethystDev-Labs/kiro.rs.git .
+
 FROM node:22-alpine AS frontend-builder
+WORKDIR /app
+COPY --from=source /app /app
 WORKDIR /app/admin-ui
-COPY admin-ui/package.json admin-ui/pnpm-lock.yaml* ./
 RUN npm install -g pnpm && pnpm install
-COPY admin-ui ./
 RUN pnpm build
 
-# 阶段2: 构建 Rust 后端
 FROM rustlang/rust:nightly AS builder
 WORKDIR /app
-RUN git clone https://github.com/AmethystDev-Labs/kiro.rs.git .
+COPY --from=source /app /app
 COPY --from=frontend-builder /app/admin-ui/dist /app/admin-ui/dist
 RUN cargo build --release --features embed-admin-ui
 
-# 阶段3: 最终运行镜像
 FROM debian:bookworm-slim
 RUN apt-get update && \
-    apt-get install -y ca-certificates curl openssl jq xxd && \
-    rm -rf /var/lib/apt/lists/*
+apt-get install -y ca-certificates curl openssl jq xxd && \
+rm -rf /var/lib/apt/lists/*
 WORKDIR /app
 COPY --from=builder /app/target/release/kiro-rs /app/kiro-rs
 COPY start.sh /app/start.sh