Update to AlmaLinux 10 and OpenVox 8 (#4)

* Update to AlmaLinux 10 and OpenVox 8
* Add PR tests
* Update README.md

Author: silug

.github/workflows/pr.yml

@@ -0,0 +1,26 @@
+---
+name: Pull Request Tests
+
+'on':
+  pull_request:
+    branches:
+      - main
+      - master
+  push:
+    branches:
+      - main
+      - master
+
+jobs:
+  hadolint:
+    name: Lint Dockerfile
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v5
+
+      - name: Run hadolint
+        uses: hadolint/hadolint-action@v3.3.0
+        with:
+          dockerfile: Dockerfile
+          failure-threshold: warning

Dockerfile

@@ -1,5 +1,6 @@
-FROM centos:7
+FROM almalinux:10
 
-RUN yum -y install http://yum.puppet.com/puppet6/puppet6-release-el-7.noarch.rpm && \
-    yum -y install puppet-agent && \
-    yum clean all
+# hadolint ignore=DL3041
+RUN dnf -y install "https://yum.voxpupuli.org/openvox8-release-el-$(rpm -E %rhel).noarch.rpm" && \
+    dnf -y install openvox-agent && \
+    dnf clean all

README.md

@@ -1,6 +1,33 @@
 # docker-sandbox
 
-This repo contains a Docker configuration for a basic CentOS 7 + Puppet AIO system
+This repo contains a Docker configuration for a basic AlmaLinux + OpenVox system
 suitable for demonstration purposes.  To use it, run the following:
 
-    docker run --rm -it puppetbootstrap/sandbox /bin/bash
+```shell
+docker run --rm -it ghcr.io/puppet-bootstrap/sandbox:latest
+```
+
+You can also use `podman`:
+
+```shell
+podman run --rm -it ghcr.io/puppet-bootstrap/sandbox:latest
+```
+
+Inside the container, all `puppet` commands will work as expected, but you can safely
+make changes in the ephemeral storage without it affecting your system.
+
+```
+$ podman run --rm -it ghcr.io/puppet-bootstrap/sandbox:latest
+[root@e43c4102b9e5 /]# puppet resource file /tmp/test_file ensure=file
+Notice: /File[/tmp/test_file]/ensure: created
+file { '/tmp/test_file':
+  ensure   => 'file',
+  provider => 'posix',
+}
+[root@e43c4102b9e5 /]# ls -l /tmp/test_file
+-rw-r--r-- 1 root root 0 Oct 23 20:55 /tmp/test_file
+[root@e43c4102b9e5 /]# exit
+exit
+$ ls -l /tmp/test_file
+ls: cannot access '/tmp/test_file': No such file or directory
+```