be compatible with container.network_mode

internal/pkg/config/config.example.yaml

@@ -45,7 +45,7 @@ container:
   # Specifies the network to which the container will connect.
   # Could be host, bridge or the name of a custom network.
   # If it's empty, act_runner will create a network automatically.
-  network:
+  network: ""
   # Whether to use privileged mode or not when launching task containers (privileged mode is required for Docker-in-Docker).
   privileged: false
   # And other options to be used when the container is started (eg, --add-host=my.gitea.url:host-gateway).

internal/pkg/config/config.go

@@ -34,8 +34,8 @@ type Config struct {
 		Port    uint16 `yaml:"port"`
 	} `yaml:"cache"`
 	Container struct {
-		// NetworkMode   string `yaml:"network_mode"` // Legacy
 		Network       string `yaml:"network"`
+		NetworkMode   string `yaml:"network_mode"` // leagcy, but will be abandoned in future, be replace by network.
 		Privileged    bool   `yaml:"privileged"`
 		Options       string `yaml:"options"`
 		WorkdirParent string `yaml:"workdir_parent"`
@@ -103,5 +103,13 @@ func LoadDefault(file string) (*Config, error) {
 		cfg.Runner.FetchInterval = 2 * time.Second
 	}
 
+	// although `container.network_mode` will be abandoned,
+	// but we have to be compatible with it for now.
+	// rule: if the value of `container.network` is blank and the value of `container.network_mode` is not blank,
+	// then the value of `container.network` will be set to the value of `container.network_mode`.
+	if cfg.Container.Network == "" && cfg.Container.NetworkMode != "" {
+		cfg.Container.Network = cfg.Container.NetworkMode
+	}
+
 	return cfg, nil
 }