Building Multi-Architecture Docker Images on ARM 64

docker-build.out

$ docker buildx build --platform linux/amd64,linux/arm64 -t foo4u/demo-mutliarch:2 --push .
[+] Building 4.7s (9/9) FINISHED
 => [internal] load build definition from Dockerfile                                                                                                                             0.0s
 => => transferring dockerfile: 31B                                                                                                                                              0.0s
 => [internal] load .dockerignore                                                                                                                                                0.0s
 => => transferring context: 2B                                                                                                                                                  0.0s
 => [linux/amd64 internal] load metadata for docker.io/library/alpine:latest                                                                                                     0.1s
 => [linux/arm64 internal] load metadata for docker.io/library/alpine:latest                                                                                                     0.1s
 => [linux/amd64 1/2] FROM docker.io/library/alpine@sha256:2171658620155679240babee0a7714f6509fae66898db422ad803b951257db78                                                      0.0s
 => => resolve docker.io/library/alpine@sha256:2171658620155679240babee0a7714f6509fae66898db422ad803b951257db78                                                                  0.0s
 => CACHED [linux/amd64 2/2] RUN apk add util-linux                                                                                                                              0.0s
 => [linux/arm64 1/2] FROM docker.io/library/alpine@sha256:2171658620155679240babee0a7714f6509fae66898db422ad803b951257db78                                                      0.0s
 => => resolve docker.io/library/alpine@sha256:2171658620155679240babee0a7714f6509fae66898db422ad803b951257db78                                                                  0.0s
 => CACHED [linux/arm64 2/2] RUN apk add util-linux                                                                                                                              0.0s
 => exporting to image                                                                                                                                                           4.5s
 => => exporting layers                                                                                                                                                          1.3s
 => => exporting manifest sha256:cb54200a7c04dded134ca9e3e6a0e434c2fdf851fb3a7226941d0983ad5bfb88                                                                                0.0s
 => => exporting config sha256:307b885367f8ef4dc443dc35d6ed3298b9a3a48a846cf559a676c028a359731b                                                                                  0.0s
 => => exporting manifest sha256:6f4fe17def66ef5bc79279448e1cb77a1642d460ed58d5dc60d0e472c023e2eb                                                                                0.0s
 => => exporting config sha256:26e6b092c7c1efffe51ce1d5f68e3359ab44152d33df39e5b85cd4ff6cfed3d4                                                                                  0.0s
 => => exporting manifest list sha256:3b4e4135b92017e5214421543b813e83a77fcea759af8067c685b70a5d978497                                                                           0.0s
 => => pushing layers                                                                                                                                                            2.3s
 => => pushing manifest for docker.io/foo4u/demo-mutliarch:2