add release instruction to README

Ouranosinc · May 1, 2019 · b6451dc · b6451dc
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commit b6451dc
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diff --git a/README.md b/README.md
@@ -5,3 +5,12 @@ Based on upstream
 [`jupyterhub/jupyterhub`](https://hub.docker.com/r/jupyterhub/jupyterhub) image
 with extra required packages, see
 [`Dockerfile`](https://github.com/Ouranosinc/jupyterhub/blob/master/Dockerfile)
+
+## Release instruction
+
+Add a tag and push, a new
+[`pavics/jupyterhub`](https://hub.docker.com/r/pavics/jupyterhub) image will be
+available with the same tag.
+
+Keep the same original upstream `jupyterhub/jupyterhub` version in the tag so
+we know what version our image is based on.