Added pipefail, linting, docs

.github/workflows/docker-image.yml

@@ -3,14 +3,13 @@ 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]
   pull_request:
     branches: [main]
 
 jobs:
-
   build:
     runs-on: ubuntu-latest
     steps:

.github/workflows/docker-publish.yml

@@ -7,11 +7,11 @@ name: GitHub Docker Registry Build
 
 on:
   schedule:
-    - cron: '41 1 * * *'
+    - cron: "41 1 * * *"
   push:
     branches: ["main"]
     # Publish semver tags as releases.
-    tags: [ 'v*.*.*' ]
+    tags: ["v*.*.*"]
   pull_request:
     branches: ["main"]
 
@@ -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

Dockerfile

@@ -1,5 +1,7 @@
 FROM php:7.4
 
+SHELL ["/bin/bash", "-o", "pipefail", "-c"]
+
 RUN echo "" \
   && docker-php-ext-install bcmath \
   && docker-php-ext-configure pcntl \
@@ -12,8 +14,7 @@ RUN echo "" \
   && 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 \
+  && pecl install imagick && docker-php-ext-enable imagick \
-    && docker-php-ext-enable imagick \
   && curl -sS https://getcomposer.org/installer \
   | php -- --install-dir=/usr/local/bin --filename=composer
 RUN php --version \

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