Fix windows cross compilation + README.md files

README.md

@@ -0,0 +1,33 @@
+
+Building Docker Doodles
+-----------------------
+
+Building can be done with the original `docker build`, or with the new *BuildKit* application.  The new
+experimental 'buildx' command, which is in nightly builds as well as in the Docker Engine 19.03 release,
+provides a new, albeit familiar front end to BuildKit similar to the original `docker build` command.
+BuildKit has some great new added features such as increased performance, and the ability to easily build
+cross platform.
+
+To build for your own platform with the original docker build command, use:
+
+`cd <doodle> && docker build -t <username>/doodle:<doodle> ./`
+
+To build cross platform, use the `Dockerfile.cross` file, either with *BuildKit* directly, or with *buildx*.
+With buildx, you'll first need to create a cross platform `builder` instance with:
+
+`docker buildx create --use`
+
+You only need to create one builder instance, and should not need to create new ones with subsequent
+builds.  To create and push the multi-arch image to Docker Hub, use the command:
+
+`cd <doodle> && docker buildx build -f Dockerfile.cross --platform linux/amd64,linux/arm64,linux/arm/v8,linux/s390x,linux/ppc64le,windows/amd64 -t <usename>/doodle:<doodle> --push .`
+
+This will build the Doodle for these architectures:
+* linux/amd64 (64 bit Linux native)
+* linux/arm64 (suitable for Amazon EC2 A1 instances)
+* linux/arm/v8 (suitable for Raspberry Pi)
+* linux/s390x (for mainframe lovers)
+* linux/ppc64le (for IBM POWER8 Little Endian)
+* windows/amd64 (64 bit Windows native)
+
+

birthday2019/Dockerfile.cross

@@ -13,7 +13,7 @@ FROM scratch AS release-linux
 COPY --from=builder /project/surprise /surprise
 ENTRYPOINT ["/surprise"]
 
-FROM microsoft/nanoserver AS release-windows
+FROM mcr.microsoft.com/windows/nanoserver:1809 AS release-windows
 COPY --from=builder /project/surprise /surprise.exe
 ENTRYPOINT ["\\surprise.exe"]
 

birthday2019/README.md

@@ -6,7 +6,6 @@ Happy Birthday, Docker!
 March 2019 marks Docker's sixth year, and we thought we'd celebrate it docker-style with a birthday surprise!
 To try it out, run:
 
-`docker run -it --rm docker/surprise`
+`docker run -it --rm docker/doodle:birthday`
 
 Complete source can be found [here](https://github.com/docker/doodle).
-

cheers2019/Dockerfile.cross

@@ -13,7 +13,7 @@ FROM scratch AS release-linux
 COPY --from=builder /project/cheers /cheers
 ENTRYPOINT ["/cheers"]
 
-FROM microsoft/nanoserver AS release-windows
+FROM mcr.microsoft.com/windows/nanoserver:1809 AS release-windows
 COPY --from=builder /project/cheers /cheers.exe
 ENTRYPOINT ["\\cheers.exe"]
 

cheers2019/README.md

@@ -7,7 +7,6 @@ It's time for Dockercon SF 2019, and Moby wanted to celebrate it in docker style
 
 To try it out, run:
 
-`docker run -it --rm docker/cheers`
+`docker run -it --rm docker/doodle:cheers`
 
 Complete source can be found [here](https://github.com/docker/doodle).
-