Drop support for two platforms

Drop support for the `linux/ppc64le` and `linux/s390x` platforms. This
is done because the build times for these platforms push the total
workflow time over the GitHub Actions runtime limit of six hours. This
is largely due to these platforms being emulated and then having to
compile/build certain Python packages.

.github/workflows/build.yml

@@ -29,8 +29,13 @@ env:
   CURL_CACHE_DIR: ~/.cache/curl
   IMAGE_NAME: cisagov/code-gov-update
   PIP_CACHE_DIR: ~/.cache/pip
-  PLATFORMS: "linux/386,linux/amd64,linux/arm/v6,\
-  linux/arm/v7,linux/arm64/v8,linux/ppc64le,linux/s390x"
+  # We have dropped support for the linux/ppc64le and linux/s390x platforms until
+  # the run time for the build-push-all job can get below the six hour limit that
+  # exists for GitHub Actions runners. This could either be through some kind of
+  # optimization, when we matrix out the build so each platform runs on its own
+  # runner, or if we start using our own runners that have a higher time limit.
+  # Please see #150 for tracking.
+  PLATFORMS: "linux/386,linux/amd64,linux/arm/v6,linux/arm/v7,linux/arm64/v8"
   PRE_COMMIT_CACHE_DIR: ~/.cache/pre-commit
   RUN_TMATE: ${{ secrets.RUN_TMATE }}
 

README.md

@@ -8,7 +8,7 @@
 
 [![Docker Pulls](https://img.shields.io/docker/pulls/cisagov/code-gov-update)](https://hub.docker.com/r/cisagov/code-gov-update)
 [![Docker Image Size (latest by date)](https://img.shields.io/docker/image-size/cisagov/code-gov-update)](https://hub.docker.com/r/cisagov/code-gov-update)
-[![Platforms](https://img.shields.io/badge/platforms-386%20%7C%20amd64%20%7C%20arm%2Fv6%20%7C%20arm%2Fv7%20%7C%20arm64%2Fv8%20%7C%20ppc64le%20%7C%20s390x-blue)](https://hub.docker.com/r/cisagov/code-gov-update/tags)
+[![Platforms](https://img.shields.io/badge/platforms-386%20%7C%20amd64%20%7C%20arm%2Fv6%20%7C%20arm%2Fv7%20%7C%20arm64%2Fv8-blue)](https://hub.docker.com/r/cisagov/code-gov-update/tags)
 
 This project contains code for updating the DHS
 [code.gov](https://code.gov) inventory published