Add source information

README.md

@@ -6,3 +6,13 @@ To use:
 docker run -it --rm git-hojo.devnull.name/docker-base/alpine:3.21
 
 or use git-hojo.devnull.name/docker-base/alpine:3.21 in your Dockerfile
+
+
+## Source
+
+This image is based off the original alpine docker image:
+https://github.com/alpinelinux/docker-alpine/blob/v3.21/x86_64/Dockerfile
+
+With version 3.21.2,  however as we update the image prior to publishing the actual image is latest 3.21 at time of publishing
+
+Licensing of the upstream project indicates the framework is MIT, however the Linux packages in the OCI image will contain various licenses