From 63c8207d7a0c2f333ddfb65d57d4b8d0b875f82b Mon Sep 17 00:00:00 2001
From: Kumiko as a Service <Dreista@users.noreply.github.com>
Date: Thu, 30 Oct 2025 09:36:52 +0800
Subject: [PATCH] Use `--no-cache` `--upgrade` option in `apk add`

No need for separate upgrade / cache cleanup steps.

Signed-off-by: Kumiko as a Service <Dreista@users.noreply.github.com>
---
 Dockerfile | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/Dockerfile b/Dockerfile
index 359ae293e..c12b6b4cc 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -20,8 +20,6 @@ RUN set -ex \
 FROM --platform=$TARGETPLATFORM alpine AS dist
 LABEL maintainer="nekohasekai <contact-git@sekai.icu>"
 RUN set -ex \
-    && apk upgrade \
-    && apk add bash tzdata ca-certificates nftables \
-    && rm -rf /var/cache/apk/*
+    && apk add --no-cache --upgrade bash tzdata ca-certificates nftables
 COPY --from=builder /go/bin/sing-box /usr/local/bin/sing-box
 ENTRYPOINT ["sing-box"]