From 3bbe31af12e9a401c25323c83d2cbbc0b6a11eaa Mon Sep 17 00:00:00 2001
From: Dominik Menke <dom@digineo.de>
Date: Thu, 1 Feb 2024 11:20:32 +0100
Subject: [PATCH] improve readability of Dockerfile

Switch to docker/dockerfile:1 syntax. This requires buildx.
---
 Dockerfile | 28 ++++++++++++++++++----------
 1 file changed, 18 insertions(+), 10 deletions(-)

diff --git a/Dockerfile b/Dockerfile
index 1594480..4e27299 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,17 +1,25 @@
+# syntax=docker/dockerfile:1
 FROM ruby:3.2-alpine
 
 WORKDIR /app
 COPY Gemfile Gemfile.lock /app/
-RUN set -ex \
- && apk add --no-cache --virtual build-dependencies \
-      make \
-      gcc \
-      libc-dev \
-      git \
- && bundle config set --local deployment "true" \
- && bundle config set --local without "development test" \
- && bundle install \
- && apk del build-dependencies
+
+# hadolint ignore=DL3018
+RUN <<BASH
+  set -ex
+
+  apk add --no-cache --virtual build-dependencies \
+    make \
+    gcc \
+    libc-dev \
+    git
+
+  bundle config set --local deployment "true"
+  bundle config set --local without "development test"
+  bundle install
+
+  apk del build-dependencies
+BASH
 
 COPY . .