Add binary bake target (#517)

Co-authored-by: CrazyMax <crazy-max@users.noreply.github.com>

Dockerfile

@@ -28,12 +28,15 @@ FROM scratch AS artifacts
 COPY --from=build /out/*.tar.gz /
 COPY --from=build /out/*.zip /
 
+FROM scratch AS binary
+COPY --from=build /usr/local/bin/diun* /
+
 FROM alpine:3.14
 
 RUN apk --update --no-cache add \
     ca-certificates \
     openssl \
-  && rm -rf /tmp/* /var/cache/apk/*
+  && rm -rf /tmp/*
 
 COPY --from=build /usr/local/bin/diun /usr/local/bin/diun
 RUN diun --version

docker-bake.hcl

@@ -85,6 +85,12 @@ target "docs" {
   output = ["./site"]
 }
 
+target "binary" {
+  inherits = ["_common"]
+  target = "binary"
+  output = ["./bin"]
+}
+
 target "artifact" {
   inherits = ["_common"]
   target = "artifacts"