Migrate to alo organization

Update docker image path and workflow reference to use alo org.
Fix var directory permissions in docker build.

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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

.gitea/workflows/deploy.yaml

@@ -7,7 +7,7 @@ on:
 
 jobs:
   deploy:
-    uses: ppetru/alo-cluster/.gitea/workflows/deploy-nomad.yaml@master
+    uses: alo/alo-cluster/.gitea/workflows/deploy-nomad.yaml@master
     with:
       service_name: animaltrack
     secrets: inherit