doco

Dockerfile

@@ -1,14 +1,17 @@
+# This is multiarch including linux/amd64 and linux/arm64/v8, see: docker buildx imagetools inspect golang:1.21.4-alpine
 FROM golang:1.21.4-alpine AS build
 
 RUN apk update && apk upgrade && apk add --no-cache bash git
 
 WORKDIR .
 COPY . /proj/
 
+# now build from source on each platform this Dockerfile gets executed
 WORKDIR /proj
 RUN CGO_ENABLED=0 go build github.com/simonmittag/j8a/cmd/j8a
 
-#multistage build uses output from previous image
+# multistage build uses output from previous image
+# base image for distro is also multiarch, see: docker buildx imagetools inspect alpine
 FROM alpine
 COPY --from=build /proj/j8a /j8a