Allowing for an alternate port

run-ai-image.sh

@@ -10,6 +10,7 @@ cd "$(dirname "$0")"
 [ -f .ai-config ] || { echo "No .ai-config yet - run ./setup.sh first." >&2; exit 1; }
 # shellcheck disable=SC1091
 source .ai-config
+PORT=${AI_PORT:-$PORT}   # override for one run: AI_PORT=11500 ./run-ai-image.sh
 
 running() { [ "$(docker inspect -f '{{.State.Running}}' "$CONTAINER_NAME" 2>/dev/null)" = "true" ]; }
 exists()  { docker inspect "$CONTAINER_NAME" >/dev/null 2>&1; }
@@ -28,6 +29,12 @@ if running; then
   echo "Already running on http://127.0.0.1:$PORT"
 else
   exists && docker rm -f "$CONTAINER_NAME" >/dev/null
+  if (exec 3<>"/dev/tcp/127.0.0.1/$PORT") 2>/dev/null; then
+    echo "Port $PORT is already in use by something else (a host Ollama, another container?):" >&2
+    docker ps --filter "publish=$PORT" --format '  container {{.Names}}' >&2 || true
+    echo "Re-run ./setup.sh to pick a free port, or use: AI_PORT=<free port> ./run-ai-image.sh" >&2
+    exit 1
+  fi
   args=(-d --name "$CONTAINER_NAME" -p "127.0.0.1:$PORT:11434" --restart unless-stopped)
   [ "$USE_GPU" = "1" ] && args+=(--gpus all)
   docker run "${args[@]}" "$IMAGE_NAME" >/dev/null