Add ARM arch build

Dockerfile

@@ -2,14 +2,15 @@ FROM golang AS builder
 MAINTAINER "Cuong Manh Le <[email protected]>"
 
 RUN apt-get update && \
+    dpkg --add-architecture arm64 &&\
     apt-get install -y --no-install-recommends build-essential && \
     apt-get clean && \
     mkdir -p "$GOPATH/src/github.com/bitnami-labs/kubewatch"
 
 ADD . "$GOPATH/src/github.com/bitnami-labs/kubewatch"
 
 RUN cd "$GOPATH/src/github.com/bitnami-labs/kubewatch" && \
-    CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -a --installsuffix cgo --ldflags="-s" -o /kubewatch
+    CGO_ENABLED=0 GOOS=linux GOARCH=$(dpkg --print-architecture) go build -a --installsuffix cgo --ldflags="-s" -o /kubewatch
 
 FROM bitnami/minideb:bullseye
 RUN install_packages ca-certificates

build_with_arm.sh

@@ -0,0 +1,5 @@
+docker buildx build \
+  --platform linux/arm64,linux/amd64  \
+  --tag $IMAGE \
+  --push \
+  $BUILD_CONTEXT