Speed up one-click Docker deployment

DouYinSparkFlow/Dockerfile.server

@@ -31,9 +31,7 @@ RUN set -eux; \
     && sed -i 's/security.ubuntu.com/mirrors.aliyun.com/g' /etc/apt/sources.list \
     && ln -fs /usr/share/zoneinfo/${TZ} /etc/localtime \
     && echo ${TZ} > /etc/timezone \
-    && apt-get update && apt-get install -y \
-      cron \
-      curl \
+    && apt-get update && apt-get install -y --no-install-recommends \
       fluxbox \
       fonts-wqy-zenhei \
       fonts-noto-cjk \
@@ -41,12 +39,6 @@ RUN set -eux; \
       websockify \
       x11vnc \
       xfonts-intl-chinese \
-    && download() { url="$1"; output="$2"; proxy_url="${HTTPS_PROXY:-${https_proxy:-${HTTP_PROXY:-${http_proxy:-}}}}"; if [ -n "$proxy_url" ]; then curl -fsSL -x "$proxy_url" "$url" -o "$output"; else curl -fsSL "$url" -o "$output"; fi; } \
-    && download https://download.docker.com/linux/static/stable/x86_64/docker-25.0.3.tgz docker.tgz \
-    && tar xzvf docker.tgz \
-    && mv docker/docker /usr/bin/docker \
-    && chmod +x /usr/bin/docker \
-    && rm -rf docker docker.tgz \
     && rm -rf /var/lib/apt/lists/*
 
 COPY . .