brioche & docker pg upgrade

content/geek/docker/postgresql.md

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++++
+title = 'Postgresql'
+date = 2025-03-28T21:43:20+01:00
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+
+
+# Docker upgrade
+
+First, create the new volume to new version
+
+```
+docker volume create postgres-XX
+```
+
+In `docker-compose` add in volume the section with the new volume.
+In service duplicate the postgres section, append version
+
+start the new empty database, import new data like:
+
+```
+docker-compose exec --user postgres -i postgres16 pg_dumpall | docker-compose exec --user postgres -T postgres psql
+```
+
+Then remove old DB in __docker-compose.yml__, clean volume etc.