switch to use set for network names

Author: AlexMcDermott

src/restic_compose_backup/backup_runner.py

@@ -12,7 +12,7 @@ def run(
     volumes: dict = None,
     environment: dict = None,
     labels: dict = None,
-    network_names: list[str] = [],
+    network_names: set[str] = set(),
 ):
     logger.info("Starting backup container")
     client = utils.docker_client()

src/restic_compose_backup/containers.py

@@ -483,9 +483,9 @@ def containers_for_backup(self) -> list[Container]:
         """Obtain all containers with backup enabled"""
         return [container for container in self.containers if container.backup_enabled]
 
-    def networks_for_backup(self) -> list[str]:
+    def networks_for_backup(self) -> set[str]:
         """Obtain all networks needed for backup"""
-        return [container.network_name for container in self.containers_for_backup()]
+        return {container.network_name for container in self.containers_for_backup()}
 
     def generate_backup_mounts(self, dest_prefix="/volumes") -> dict:
         """Generate mounts for backup for the entire compose setup"""