Add systemd-ubuntu:25.10/systemd-ubuntu:questing

Add the Dockerfile and actions for Ubuntu 25.10 (Questing Quokka).

Author: zupo

.github/workflows/build.yml

@@ -106,6 +106,15 @@ jobs:
             tags: |-
               jrei/systemd-ubuntu:25.04
               jrei/systemd-ubuntu:plucky
+          - name: systemd-ubuntu-25.10
+            dockerfile: systemd/ubuntu/25.10.Dockerfile
+            platforms: |-
+              linux/amd64
+              linux/arm/v7
+              linux/arm64
+            tags: |-
+              jrei/systemd-ubuntu:25.10
+              jrei/systemd-ubuntu:questing
               jrei/systemd-ubuntu:latest
 
     steps:

systemd/ubuntu/25.10.Dockerfile

@@ -0,0 +1,27 @@
+FROM ubuntu:25.10
+
+ENV container docker
+ENV LC_ALL C
+ENV DEBIAN_FRONTEND noninteractive
+
+RUN apt-get update \
+    && apt-get install -y systemd systemd-sysv \
+    && apt-get clean \
+    && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
+
+RUN cd /lib/systemd/system/sysinit.target.wants/ \
+    && rm $(ls | grep -v systemd-tmpfiles-setup)
+
+RUN rm -f /lib/systemd/system/multi-user.target.wants/* \
+    /etc/systemd/system/*.wants/* \
+    /lib/systemd/system/local-fs.target.wants/* \
+    /lib/systemd/system/sockets.target.wants/*udev* \
+    /lib/systemd/system/sockets.target.wants/*initctl* \
+    /lib/systemd/system/basic.target.wants/* \
+    /lib/systemd/system/anaconda.target.wants/* \
+    /lib/systemd/system/plymouth* \
+    /lib/systemd/system/systemd-update-utmp*
+
+VOLUME [ "/sys/fs/cgroup" ]
+
+CMD ["/lib/systemd/systemd"]

systemd/ubuntu/README.md

@@ -3,7 +3,8 @@
 You can use this image as a base container to run systemd services inside.
 
 ## Supported tags
- - `25.04`, `latest`
+ - `25.10`, `latest`
+ - `25.04`
  - `24.04`
  - `22.04`
  - `20.04`