feat: enable linux/arm64 build (#88)

---------

Co-authored-by: Anton Ovchinnikov <anton@tonyo.info>

Author: nohant

.github/workflows/build-push.yaml

@@ -23,7 +23,7 @@ jobs:
       matrix:
         arch:
           - linux/amd64
-          # - linux/arm64
+          - linux/arm64
     permissions:
       packages: write
       contents: read

Dockerfile

@@ -10,7 +10,7 @@ RUN go mod download
 
 COPY *.go ./
 
-ENV CGO_ENABLED=0 GOOS=linux
+ENV CGO_ENABLED=0 GOOS=${TARGETPLATFORM} GOARCH=${TARGETARCH} GO111MODULE=on
 
 RUN go build -o /bin/sentry-kubernetes