[PATCH] CI: Turn debian/12-x86_64 into a non-root container

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

From: Javi Merino <javi.merino@xxxxxxxxx>

Since commit 4611ae6fb8f9 ("CI: save toolstack artifact as cpio.gz"), the
various automation/scripts/* no longer need to be root to correctly repack the
initrd for test.

Signed-off-by: Javi Merino <javi.merino@xxxxxxxxx>
Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
---
CC: Roger Pau Monné <roger.pau@xxxxxxxxxx>
CC: Stefano Stabellini <sstabellini@xxxxxxxxxx>
CC: Anthony PERARD <anthony.perard@xxxxxxxxxx>

Xen 4.20 and later uses debian:12-x86_64 and also contains 4611ae6fb8f9 so
this is safe to change generally.
---
 automation/build/debian/12-x86_64.dockerfile | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/automation/build/debian/12-x86_64.dockerfile 
b/automation/build/debian/12-x86_64.dockerfile
index e26a19079e38..3cf99c730b61 100644
--- a/automation/build/debian/12-x86_64.dockerfile
+++ b/automation/build/debian/12-x86_64.dockerfile
@@ -9,6 +9,8 @@ RUN <<EOF
 #!/bin/bash
     set -eu
 
+    useradd --create-home user
+
     apt-get update
 
     DEPS=(
@@ -70,5 +72,5 @@ RUN <<EOF
     rm -rf /var/lib/apt/lists*
 EOF
 
-USER root
+USER user
 WORKDIR /build
-- 
2.39.5