改用 musl 全静态修复 DNS 解析，并规范 Dockerfile 与产物命名

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

docker/Dockerfile.ubuntu

@@ -1,50 +0,0 @@
-# 使用 Ubuntu 20.04 作为基础镜像（glibc 2.31，兼容更老系统）
-FROM ubuntu:20.04 AS base
-
-ARG TARGETARCH
-ARG BUILDPLATFORM
-
-ENV DEBIAN_FRONTEND=noninteractive
-
-RUN apt-get update && apt-get install -y \
-    git \
-    wget \
-    build-essential \
-    cmake \
-    automake \
-    autoconf \
-    libtool \
-    perl \
-    && rm -rf /var/lib/apt/lists/*
-
-FROM base AS build
-
-ARG XXXIG_PROXY_VERSION
-ARG TARGETARCH
-ARG BUILDPLATFORM
-ARG TARGETPLATFORM
-
-RUN git clone --recursive https://github.com/wangdefaa/xxxig-proxy.git && \
-    cd xxxig-proxy && \
-    git checkout ${XXXIG_PROXY_VERSION}
-
-WORKDIR /xxxig-proxy
-
-# 先编译静态依赖（libuv/OpenSSL）到 scripts/deps，再静态链接构建 proxy
-RUN mkdir build && cd scripts && chmod +x ./*.sh && \
-    if [ "$BUILDPLATFORM" != "$TARGETPLATFORM" ]; then \
-        MAKE_JOBS="-j2"; \
-    else \
-        MAKE_JOBS="-j$(nproc)"; \
-    fi && \
-    echo "Building with parallel jobs: $MAKE_JOBS (cross-compile: $([ "$BUILDPLATFORM" != "$TARGETPLATFORM" ] && echo yes || echo no))" && \
-    ./build_deps.sh $MAKE_JOBS && cd ../build && \
-    cmake .. -DCMAKE_BUILD_TYPE=Release -DXMRIG_DEPS=scripts/deps -DBUILD_STATIC=ON && \
-    make $MAKE_JOBS
-
-FROM scratch
-
-ARG TARGETARCH
-
-COPY --from=build /xxxig-proxy/build/xxxig-proxy /linux_${TARGETARCH}/xxxig-proxy
-COPY --from=build /xxxig-proxy/src/config.json /linux_${TARGETARCH}/config.json