CI：修复 github 被墙问题——用 gh-proxy 克隆 MOOS-IvP，apt 走阿里云镜像

ci/Dockerfile

@@ -4,6 +4,8 @@
 #        - Ubuntu 20.04 arm64 base (matches the target board)
 #        - MOOS-IvP built from source and installed to /usr/local
 #        - jsoncpp (the only extra dep used by pPowerManger)
+#        NOTE: github.com is unreachable from the CN runner, so MOOS-IvP
+#              is cloned via a github proxy with fallbacks.
 #=======================================================================
 
 FROM arm64v8/ubuntu:20.04
@@ -11,9 +13,13 @@ FROM arm64v8/ubuntu:20.04
 ENV DEBIAN_FRONTEND=noninteractive
 
 #-----------------------------------------------------------------------
-# System toolchain + dependencies
+# Use Aliyun mirror for apt (faster from CN) then install toolchain
 #-----------------------------------------------------------------------
-RUN apt-get update && apt-get install -y --no-install-recommends \
+RUN sed -i \
+      -e 's|http://ports.ubuntu.com/ubuntu-ports|http://mirrors.aliyun.com/ubuntu-ports|g' \
+      -e 's|http://archive.ubuntu.com/ubuntu|http://mirrors.aliyun.com/ubuntu|g' \
+      /etc/apt/sources.list && \
+    apt-get update && apt-get install -y --no-install-recommends \
         build-essential \
         cmake \
         git \
@@ -31,8 +37,11 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
 #-----------------------------------------------------------------------
 WORKDIR /opt
 
-RUN git clone --depth 1 https://github.com/moos-ivp/moos-ivp.git && \
-    cd moos-ivp && \
+RUN git clone --depth 1 https://gh-proxy.com/https://github.com/moos-ivp/moos-ivp.git /opt/moos-ivp \
+    || git clone --depth 1 https://ghfast.top/https://github.com/moos-ivp/moos-ivp.git /opt/moos-ivp \
+    || git clone --depth 1 https://github.com/moos-ivp/moos-ivp.git /opt/moos-ivp
+
+RUN cd /opt/moos-ivp && \
     ./build-moos.sh -m -j"$(nproc)" && \
     make -C build/MOOS/MOOSCore install && \
     make -C build/MOOS/MOOSGeodesy install && \