Build armv6 variant

Dockerfile

@@ -5,6 +5,8 @@ ARG arch=amd64
 COPY . /code
 WORKDIR /code
 
+ENV GOARM 6
+
 RUN CGO_ENABLED=0 GOOS=linux GOARCH=$arch go build -a -installsuffix cgo http.go
 
 FROM scratch

travis-deploy.sh

@@ -45,8 +45,8 @@ if [ "$ARCH" == "amd64" ]; then
     "$image:linux-arm64-$TRAVIS_TAG" \
     "$image:windows-amd64-$TRAVIS_TAG" \
     "$image:windows-amd64-$TRAVIS_TAG-1709"
-  ./docker manifest annotate "$image:$TRAVIS_TAG" "$image:linux-arm-$TRAVIS_TAG" --os linux --arch arm
-  ./docker manifest annotate "$image:$TRAVIS_TAG" "$image:linux-arm64-$TRAVIS_TAG" --os linux --arch arm64
+  ./docker manifest annotate "$image:$TRAVIS_TAG" "$image:linux-arm-$TRAVIS_TAG" --os linux --arch arm --variant v6
+  ./docker manifest annotate "$image:$TRAVIS_TAG" "$image:linux-arm64-$TRAVIS_TAG" --os linux --arch arm64 --variant v8
   ./docker manifest push "$image:$TRAVIS_TAG"
 
   echo "Pushing manifest $image:latest"
@@ -56,7 +56,7 @@ if [ "$ARCH" == "amd64" ]; then
     "$image:linux-arm64-$TRAVIS_TAG" \
     "$image:windows-amd64-$TRAVIS_TAG" \
     "$image:windows-amd64-$TRAVIS_TAG-1709"
-  ./docker manifest annotate "$image:latest" "$image:linux-arm-$TRAVIS_TAG" --os linux --arch arm
-  ./docker manifest annotate "$image:latest" "$image:linux-arm64-$TRAVIS_TAG" --os linux --arch arm64
+  ./docker manifest annotate "$image:latest" "$image:linux-arm-$TRAVIS_TAG" --os linux --arch arm --variant v6
+  ./docker manifest annotate "$image:latest" "$image:linux-arm64-$TRAVIS_TAG" --os linux --arch arm64 --variant v8
   ./docker manifest push "$image:latest"
 fi