add pi3 to inventory + fixes

README.md

@@ -22,6 +22,9 @@ flowchart
     subgraph Home
         subgraph pi1
             runner[/gitea runners\]
+            subgraph small HD
+                backup_data
+            end
         end
         subgraph pi2
             PG[(Postgres)]
@@ -33,6 +36,11 @@ flowchart
                 Gitea_data
             end
         end
+        subgraph pi3
+            subgraph ai
+                ollama
+            end
+        end
         subgraph "master (macbook pro)"
             ansible{{ansible control-node}}
             tofu{{opentofu control-node}}