From d272cd80d5e73651379651a491eddc78935bc3ac Mon Sep 17 00:00:00 2001
From: Peter Dave Hello <hsu@peterdavehello.org>
Date: Thu, 4 Nov 2021 20:17:40 +0800
Subject: [PATCH] Prevent leaving apk cache in Docker image (#1440)

Use `--no-cache` with `apk upgrade` instead of additional `apk update`
---
 Dockerfile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Dockerfile b/Dockerfile
index d76c0b1e0..39624571a 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -53,7 +53,7 @@ FROM alpine:3.13.3
 LABEL maintainer="tckb <tckb@tgrthi.me>"
 ENV LANG=C.UTF-8
 
-RUN apk update && apk upgrade
+RUN apk upgrade --no-cache
 
 RUN apk add --no-cache openssl ncurses libstdc++ libgcc