From ac0c16a44a744d28cd242e218f8d8c607bcee7cb Mon Sep 17 00:00:00 2001
From: Peter Dave Hello <hsu@peterdavehello.org>
Date: Mon, 17 Mar 2025 21:55:14 +0800
Subject: [PATCH] =?UTF-8?q?=E2=9A=A1=EF=B8=8F(docker)=20Optimize=20Dockerf?=
 =?UTF-8?q?ile=20to=20use=20`apk`=20with=20`--no-cache`?=
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Using the `apk` commands with the `--no-cache` parameter for package
installation and upgrade will prevent the package index from being
cached and reduce the built image size.
---
 CHANGELOG.md | 4 ++++
 Dockerfile   | 9 ++++-----
 2 files changed, 8 insertions(+), 5 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9325c9c7..af080561 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,10 @@ and this project adheres to
 
 ## [Unreleased]
 
+### Changed
+
+- ⚡️(docker) Optimize Dockerfile to use apk with --no-cache #743
+
 ## [3.4.1] - 2025-07-15
 
 ### Fixed
diff --git a/Dockerfile b/Dockerfile
index 37c76034..90b68476 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -7,8 +7,7 @@ FROM python:3.13.3-alpine AS base
 RUN python -m pip install --upgrade pip setuptools
 
 # Upgrade system packages to install security updates
-RUN apk update && \
-  apk upgrade
+RUN apk update && apk upgrade --no-cache
 
 # ---- Back-end builder image ----
 FROM base AS back-builder
@@ -45,7 +44,7 @@ FROM base AS link-collector
 ARG IMPRESS_STATIC_ROOT=/data/static
 
 # Install pango & rdfind
-RUN apk add \
+RUN apk add --no-cache \
   pango \
   rdfind
 
@@ -71,7 +70,7 @@ FROM base AS core
 ENV PYTHONUNBUFFERED=1
 
 # Install required system libs
-RUN apk add \
+RUN apk add --no-cache \
   cairo \
   file \
   font-noto \
@@ -117,7 +116,7 @@ FROM core AS backend-development
 USER root:root
 
 # Install psql
-RUN apk add postgresql-client
+RUN apk add --no-cache postgresql-client
 
 # Uninstall impress and re-install it in editable mode along with development
 # dependencies