fix: check for docker at absolute path /opt/fw/docker/bin/docker

sources/python/deploy.py

@@ -127,11 +127,14 @@ def main():
         return deploy_all()
 
     print(f"═══ Wallarm Node Manager v{VERSION} ═══\n")
-    print("Preflight checks...")
-    if not shutil.which("docker"):
-        print("  ❌ Docker not found. Run setup.sh first.")
-        sys.exit(1)
-    print("  ✅ Docker ready\n")
+print("Preflight checks...")
+docker_bin = f"{DOCKER_DIR}/bin/docker"
+if not os.path.exists(docker_bin):
+    print(f"  ❌ Docker not found at {docker_bin}. Run setup.sh first.")
+    sys.exit(1)
+# Add to PATH for subprocess calls
+os.environ["PATH"] = f"{DOCKER_DIR}/bin:{os.environ.get('PATH', '')}"
+print("  ✅ Docker ready\n")
 
     cfg = load_config()
     deployed = {n["name"] for n in load_state().get("nodes", [])}