Add README

README.md

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+# gluecontainers
+
+Dockerbuilds and related files to set up existing container images the way I want them.
+
+## How Build?
+
+Use a Docker BuildKit setup, like so:
+
+```bash
+docker buildx create --use --name builder1
+docker buildx inspect --bootstrap
+docker buildx install
+```
+
+Then build the container in question with multiple architectures:
+
+```bash
+docker build --platform linux/arm,linux/arm64,linux/amd64 .
+```
+
+Optionally using something like `-t rehashedsalt/project:latest --push` to push up straight to master on Dockerhub.