From f9a9cafd051d6ca6fe6741632927c4fb98cb5dda Mon Sep 17 00:00:00 2001
From: Peter Dave Hello <hsu@peterdavehello.org>
Date: Wed, 23 Aug 2023 23:04:29 +0800
Subject: [PATCH] Remove additional `-U` for `apk` in Dockerfile

There is no need to use `-U` with `--no-cache` when using `apk` on
Alpine Linux, as using `--no-cache` will fetch the index every time and leave no local cache, so the index will always be the latest, without temporary files remain in the image.
---
 Dockerfile | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Dockerfile b/Dockerfile
index 196ba43..bb93cdb 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -8,8 +8,8 @@ RUN go mod download
 RUN go build ./cmd/httpx
 
 FROM alpine:3.18.2
-RUN apk -U upgrade --no-cache \
+RUN apk upgrade --no-cache \
     && apk add --no-cache bind-tools ca-certificates chromium
 COPY --from=builder /app/httpx /usr/local/bin/
 
-ENTRYPOINT ["httpx"]
\ No newline at end of file
+ENTRYPOINT ["httpx"]