Merge pull request #146 from epics-containers/august-update

add notes on copier update of giocs

Author: gilesknap

docs/how-to/update_generic_ioc.md

@@ -0,0 +1,29 @@
+# Updating a Generic IOC to the Latest Copier Template
+
+This requires that you have copier in your path which you can do by activating a virtual environment and installing it.
+
+```bash
+pip install copier
+```
+
+Then you can run the following command to update your generic IOC to the latest template, this example for ioc-adaravis.
+
+```bash
+git clone ioc-adaravis --recursive
+cd ioc-adaravis
+git checkout -b update-template
+copier update --trust
+cd ibek-support
+checkout main
+cd ..
+git add .
+git commit -m "Update to latest template"
+git push -u origin update-template
+```
+
+Now check the CI runs as expected. You may also verify locally with:
+
+```bash
+./build.sh
+./tests/run_tests.sh
+```