更新 Dockerfile，添加 bun-bin 镜像并复制 bun

Dockerfile

@@ -1,3 +1,5 @@
+FROM oven/bun:1 AS bun-bin
+
 FROM smanx/opencode:latest AS base
 USER root
 ARG UBUNTU_APT_MIRROR=mirrors.aliyun.com
@@ -17,8 +19,6 @@ RUN sed -i "s|http://archive.ubuntu.com|https://${UBUNTU_APT_MIRROR}|g; s|http:/
     python3 \
     python3-venv && \
     curl -LsSf https://astral.sh/uv/install.sh | sh && \
-    curl -fsSL https://bun.sh/install | bash && \
-    ln -s /root/.bun/bin/bun /usr/local/bin/bun && \
     ln -s /root/.local/bin/uv /usr/local/bin/uv && \
     ln -sf /usr/bin/python3 /usr/local/bin/python && \
     mkdir -p /root/.config/pip && \
@@ -38,6 +38,8 @@ RUN sed -i "s|http://archive.ubuntu.com|https://${UBUNTU_APT_MIRROR}|g; s|http:/
     pytest && \
     rm -rf /var/lib/apt/lists/*
 
+COPY --from=bun-bin /usr/local/bin/bun /usr/local/bin/bun
+
 FROM base AS deps
 
 WORKDIR /app