diff --git a/.github/workflows/docker-image.yml b/.github/workflows/docker-image.yml
index 8746a90..1742e2c 100644
--- a/.github/workflows/docker-image.yml
+++ b/.github/workflows/docker-image.yml
@@ -3,24 +3,23 @@ name: Docker Image CI
 on:
   workflow_dispatch:
   schedule:
-    - cron: '15 * 1,15 * *' # Runs only on default branch
+    - cron: "15 * 1,15 * *" # Runs only on default branch
   push:
-    branches: [ main ]
+    branches: [main]
   pull_request:
-    branches: [ main ]
+    branches: [main]
 
 jobs:
-
   build:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v4
-    - name: Publish to Registry
-      uses: elgohr/Publish-Docker-Github-Action@v5
-      with:
-        name: ivuorinen/docker-php-with-imagick
-        username: ${{ secrets.DOCKER_USERNAME }}
-        password: ${{ secrets.DOCKER_PASSWORD }}
-        default_branch: main
-        tags: "latest,php74"
-        cache: ${{ github.event_name != 'schedule' }}
+      - uses: actions/checkout@v4
+      - name: Publish to Registry
+        uses: elgohr/Publish-Docker-Github-Action@v5
+        with:
+          name: ivuorinen/docker-php-with-imagick
+          username: ${{ secrets.DOCKER_USERNAME }}
+          password: ${{ secrets.DOCKER_PASSWORD }}
+          default_branch: main
+          tags: "latest,php74"
+          cache: ${{ github.event_name != 'schedule' }}
diff --git a/.github/workflows/docker-publish.yml b/.github/workflows/docker-publish.yml
index a38ad6e..a106ee7 100644
--- a/.github/workflows/docker-publish.yml
+++ b/.github/workflows/docker-publish.yml
@@ -7,13 +7,13 @@ name: GitHub Docker Registry Build
 
 on:
   schedule:
-    - cron: '41 1 * * *'
+    - cron: "41 1 * * *"
   push:
-    branches: [ "main" ]
+    branches: ["main"]
     # Publish semver tags as releases.
-    tags: [ 'v*.*.*' ]
+    tags: ["v*.*.*"]
   pull_request:
-    branches: [ "main" ]
+    branches: ["main"]
 
 env:
   # Use docker.io for Docker Hub if empty
@@ -21,10 +21,8 @@ env:
   # github.repository as <account>/<repo>
   IMAGE_NAME: ${{ github.repository }}
 
-
 jobs:
   build:
-
     runs-on: ubuntu-latest
     permissions:
       contents: read
@@ -43,8 +41,7 @@ jobs:
         if: github.event_name != 'pull_request'
         uses: sigstore/cosign-installer@main
         with:
-          cosign-release: 'v1.13.1'
-
+          cosign-release: "v1.13.1"
 
       # Workaround: https://github.com/docker/build-push-action/issues/461
       - name: Setup Docker buildx
diff --git a/Dockerfile b/Dockerfile
index 30cdf19..9e3addb 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,21 +1,22 @@
 FROM php:7.4
 
-RUN echo "" \
-    && docker-php-ext-install bcmath \
-    && docker-php-ext-configure pcntl \
-    && docker-php-ext-install pcntl \
-    && apt-get update \
-    && apt-get install -y \
-    libicu-dev libxml2-dev libfreetype6-dev libjpeg62-turbo-dev \
-    libpng-dev libonig-dev libmagickwand-dev python-dev unzip \
-    && apt-get clean \
-    && rm -rf /var/lib/apt/lists/* \
-    && docker-php-ext-configure gd --with-freetype --with-jpeg \
-    && docker-php-ext-install -j$(nproc) intl mbstring pdo xml gd exif bcmath \
-    && yes '' | pecl install imagick \
-    && docker-php-ext-enable imagick \
-    && curl -sS https://getcomposer.org/installer \
-    | php -- --install-dir=/usr/local/bin --filename=composer
-RUN php --version \
-    && composer --version
+SHELL ["/bin/bash", "-o", "pipefail", "-c"]
+
+RUN echo "" \
+  && docker-php-ext-install bcmath \
+  && docker-php-ext-configure pcntl \
+  && docker-php-ext-install pcntl \
+  && apt-get update \
+  && apt-get install -y \
+  libicu-dev libxml2-dev libfreetype6-dev libjpeg62-turbo-dev \
+  libpng-dev libonig-dev libmagickwand-dev python-dev unzip \
+  && apt-get clean \
+  && rm -rf /var/lib/apt/lists/* \
+  && docker-php-ext-configure gd --with-freetype --with-jpeg \
+  && docker-php-ext-install -j$(nproc) intl mbstring pdo xml gd exif bcmath \
+  && pecl install imagick && docker-php-ext-enable imagick \
+  && curl -sS https://getcomposer.org/installer \
+  | php -- --install-dir=/usr/local/bin --filename=composer
+RUN php --version \
+  && composer --version
 
diff --git a/README.md b/README.md
index 23dc389..b75fab9 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,20 @@
 # docker-php-with-imagick
+
 PHP 7.4 with imagick for specific purposes
+
+## Building locally
+
+### Setup docker buildx (run once)
+
+```bash
+docker run --privileged --rm tonistiigi/binfmt --install all
+docker buildx create --use
+```
+
+### Build the image
+
+```bash
+docker buildx build --platform linux/amd64,linux/arm64 .
+```
+
+Example builds for both amd64 and arm64