Merge pull request #1076 from kubecost/mmd/dont-specify-arch-in-build

Don't specify architecture in Dockerfile go build

Dockerfile

@@ -20,7 +20,7 @@ RUN set -e ;\
     go test ./test/*.go;\
     go test ./pkg/*;\
     cd cmd/costmodel;\
-    GOOS=linux GOARCH=amd64 \
+    GOOS=linux \
     go build -a -installsuffix cgo -o /go/bin/app
 
 FROM alpine:latest