board build needs a more recent ruby version than one present on Stretch

Trim · Trim · commit 9348104b44aa · 2022-08-26T18:21:47.000+02:00
At least ruby 2.5.0 is required to install one of the dependencies.
diff --git a/deployment/linuxfr-board/Dockerfile b/deployment/linuxfr-board/Dockerfile
@@ -1,4 +1,4 @@
-FROM debian:stretch-slim
+FROM ruby:2-slim-buster
 
 LABEL maintainer="adrien@adorsaz.ch"
 LABEL version="1.0"

Original file line number	Diff line number	Diff line change
`@@ -1,4 +1,4 @@`
`1`		`-FROM debian:stretch-slim`
	`1`	`+FROM ruby:2-slim-buster`
`2`	`2`
`3`	`3`	`LABEL maintainer="[email protected]"`
`4`	`4`	`LABEL version="1.0"`