Refactor variable assignments and improve script readability in validate-plex-backups.sh and validate-plex-recovery.sh

- Changed inline variable assignments to separate declaration and assignment for clarity.
- Updated condition checks and log messages for better readability and consistency.
- Added a backup of validate-plex-recovery.sh for safety.
- Introduced a new script run-docker-tests.sh for testing setup in Docker containers.
- Enhanced ssh-login.sh to improve condition checks and logging functionality.

ssh-login.sh

@@ -1,15 +1,15 @@
 #!/bin/bash
 
-# 
-# This script is referenced in `/etc/pam.d/sshd`
-# - at the end of the `sshd` file, add
-# `session optional pam_exec.so /home/acedanger/shell/ssh-login.sh`
+#
+# This script is referenced in $(/etc/pam.d/sshd)
+# - at the end of the $(sshd) file, add
+# $(session optional pam_exec.so /home/acedanger/shell/ssh-login.sh)
 #
 
-if [ "${PAM_TYPE}" = "open_session" && "${PAM_RHOST}" -ne "10.0.1.4" ]; then
+if [ "${PAM_TYPE}" = "open_session" ] && [ "${PAM_RHOST}" != "10.0.1.4" ]; then
   curl \
     -H prio:urgent \
-    -H tags:warning,ssh,login,${HOSTNAME} \
+    -H tags:warning,ssh,login,"${HOSTNAME}" \
     -d "SSH login [${HOSTNAME}] user ${PAM_USER} from ${PAM_RHOST}" \
     https://notify.peterwood.rocks/lab
 fi