Added multiarch build, because I need this image for mi Raspberry PI

.travis.yml

@@ -0,0 +1,24 @@
+sudo: required
+services:
+  - docker
+language: bash
+
+env:
+    global:
+      - TRAVIS_SECURE_ENV_VARS=true
+
+before_install:
+  - sudo apt-get remove docker docker-engine docker.io
+  - curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
+  - sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"
+  - sudo apt-get update
+  - sudo apt-get -y install docker-ce
+  - echo '{"experimental":true}' | sudo tee /etc/docker/daemon.json
+  - sudo service docker restart
+  - mkdir ~/.docker
+  - echo '{"experimental":"enabled"}' | tee ~/.docker/config.json
+  - ls -al ~/.docker/config.json
+  - cat ~/.docker/config.json
+
+script:
+  - bash build.sh $TRAVIS_REPO_SLUG $DOCKER_USERNAME $DOCKER_PASSWORD

Dockerfile

@@ -1,4 +1,5 @@
-FROM alpine:3.5
+ARG arch=amd64
+FROM multiarch/alpine:${arch}-latest-stable
 
 RUN apk add --no-cache curl jq
 
@@ -7,4 +8,4 @@ ENTRYPOINT ["/docker-entrypoint"]
 
 HEALTHCHECK --interval=5s CMD exit 0
 
-CMD ["autoheal"]
+CMD ["autoheal"]

build.sh

@@ -0,0 +1,35 @@
+#!/bin/bash
+
+REPO=${1}
+DOCKER_USERNAME=${2}
+DOCKER_PASSWORD=${3}
+declare -A ARCH_MAP
+ARCH_MAP[amd64]=amd64
+ARCH_MAP[armhf]=arm
+ARCH_MAP[arm64]=arm64
+
+docker run --rm --privileged multiarch/qemu-user-static:register --reset
+echo "$DOCKER_PASSWORD" | docker login -u "$DOCKER_USERNAME" --password-stdin
+
+echo "Building docker images"
+for i in "${!ARCH_MAP[@]}"; do
+  echo "################################################################################"
+  echo "Building and pushing: ${REPO}-${ARCH_MAP[$i]}:latest "
+  echo "################################################################################"
+  docker build --build-arg arch=${i} -t ${REPO}-${ARCH_MAP[$i]}:latest .;
+  docker push ${REPO}-${ARCH_MAP[$i]}:latest;
+done;
+
+MANIFESTS=""
+for arch in "${ARCH_MAP[@]}"; do MANIFESTS="${MANIFESTS} ${REPO}-${arch}:latest"; done
+
+echo "################################################################################"
+echo "Building and pushing: ${REPO}-${ARCH_MAP[$i]}:latest "
+echo "################################################################################"
+docker manifest create ${REPO}:latest ${MANIFESTS};
+
+for arch in "${ARCH_MAP[@]}"; do 
+  docker manifest annotate --os linux --arch ${arch} ${REPO}:latest ${REPO}-${arch}:latest;
+done;
+
+docker manifest push ${REPO}:latest