Add ARM64 Builds (#15)

* Add ARM64 builds

* Move to a go-cron fork with arm64 support

* Use TARGETARCH directly in the script

* Use buildkit for docker build in readme

.github/workflows/build-and-push-images.yml

@@ -21,6 +21,12 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v2
 
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v1
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v1
+
       - name: Log in to DockerHub
         uses: docker/login-action@v1
         with:
@@ -35,3 +41,6 @@ jobs:
           tags: ${{ github.repository }}:${{ matrix.postgres }}
           build-args: |
             ALPINE_VERSION=${{ matrix.alpine }}
+          platforms: |
+            linux/amd64
+            linux/arm64

Dockerfile

@@ -1,5 +1,6 @@
 ARG ALPINE_VERSION
 FROM alpine:${ALPINE_VERSION}
+ARG TARGETARCH
 
 ADD src/install.sh install.sh
 RUN sh install.sh && rm install.sh

README.md

@@ -50,7 +50,7 @@ docker exec <container name> sh restore.sh <timestamp>
 ## Build the image locally
 `ALPINE_VERSION` determines Postgres version compatibility. See [`build-and-push-images.yml`](.github/workflows/build-and-push-images.yml) for the latest mapping.
 ```sh
-docker build --build-arg ALPINE_VERSION=3.14
+DOCKER_BUILDKIT=1 docker build --build-arg ALPINE_VERSION=3.14 .
 ```
 ## Run a simple test environment with Docker Compose
 ```sh

src/install.sh

@@ -17,7 +17,10 @@ pip3 install awscli
 
 # install go-cron
 apk add curl
-curl -L https://github.com/odise/go-cron/releases/download/v0.0.6/go-cron-linux.gz | zcat > /usr/local/bin/go-cron
+curl -L https://github.com/ivoronin/go-cron/releases/download/v0.0.5/go-cron_0.0.5_linux_${TARGETARCH}.tar.gz -O
+tar xvf go-cron_0.0.5_linux_${TARGETARCH}.tar.gz
+rm go-cron_0.0.5_linux_${TARGETARCH}.tar.gz
+mv go-cron /usr/local/bin/go-cron
 chmod u+x /usr/local/bin/go-cron
 apk del curl