Try building arm docker image

docker/arm/Dockerfile

@@ -1,11 +1,9 @@
-FROM cmosh/alpine-arm:edge
-ENTRYPOINT ["/bin/matterbridge"]
+FROM alpine:edge as certs
+RUN apk --update add ca-certificates
 
-COPY . /go/src/github.com/42wim/matterbridge
-RUN apk update && apk add go git gcc musl-dev ca-certificates \
-        && cd /go/src/github.com/42wim/matterbridge \
-        && export GOPATH=/go \
-        && go get \
-        && go build -x -ldflags "-X main.githash=$(git log --pretty=format:'%h' -n 1)" -o /bin/matterbridge \
-        && rm -rf /go \
-        && apk del --purge git go gcc musl-dev
+FROM scratch
+ARG VERSION=1.12.3
+COPY --from=certs /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/ca-certificates.crt
+ADD https://github.com/42wim/matterbridge/releases/download/v${VERSION}/matterbridge-linux-arm /bin/matterbridge
+RUN chmod +x /bin/matterbridge
+ENTRYPOINT ["/bin/matterbridge"]