[Build] Added multiarch support for Docker images.

.drone/update-image-registry.sh

@@ -1,11 +1,26 @@
 #!/bin/sh
 
+[ -z "$DOCKER_USER" ] && echo "Please set the DOCKER_USER environment variable" && exit 1
+[ -z "$DOCKER_PASS" ] && echo "Please set the DOCKER_PASS environment variable" && exit 1
+
 export VERSION=$(grep current_version pyproject.toml | sed -r -e "s/.*=\s*['\"]?([^'\"]+)['\"]?\s*$/\1/")
+export REGISTRY_ENDPOINT="${REGISTRY_ENDPOINT:-quay.io}"
 export IMAGE_NAME="$REGISTRY_ENDPOINT/$DOCKER_USER/platypush"
 
+# Log in to the registry
 docker login "$REGISTRY_ENDPOINT" -u "$DOCKER_USER" -p "$DOCKER_PASS"
-docker build -f Dockerfile.alpine -t "$IMAGE_NAME:$VERSION" .
-docker tag "$IMAGE_NAME:$VERSION" "$IMAGE_NAME:latest"
 
-docker push "$IMAGE_NAME:$VERSION"
-docker push "$IMAGE_NAME:latest"
+# Required for multi-platform builds
+docker buildx create --name=multiarch --driver=docker-container
+
+# Build and publish the images
+docker buildx build \
+  -f Dockerfile.alpine \
+  -t "$IMAGE_NAME:$VERSION" \
+  -t "$IMAGE_NAME:latest" \
+  --platform linux/amd64,linux/arm64,linux/arm/v7 \
+  --builder multiarch \
+  --push .
+
+# Clean up
+docker buildx rm multiarch

README.md

@@ -662,6 +662,14 @@ $ docker run -it --name platypush \
     quay.io/platypush/platypush
 ```
 
+The following architectures are currently supported:
+
+- `amd64`/`x86_64` (standard Intel-based architectures)
+- `arm64`/`aarch64` (ARM64, such as modern ARM-based MacBooks, most of the
+  Android devices or RaspberryPi 4 and 5)
+- `armv7l` (older ARM-based devices, such as RaspberryPi 2 and 3 or older
+  Android devices)
+
 The Web service will be available on `http://localhost:8008`, and a default
 configuration file will be initialized under
 `/path/to/your/platypush/config/config.yaml` if not available. The next