describe overrides in code and TOML, add docs about custom ports

Author: skudasov

book/src/framework/components/chainlink/node.md

@@ -21,6 +21,8 @@ Here we provide full configuration reference, if you want to copy and run it, pl
     pull_image = true
 
   [cl_node.node]
+    # custom ports that plugins may need to expose and map to the host machine
+    custom_ports = [14000, 140001]
     # A list of paths to capability binaries
     capabilities = ["./capability_1", "./capability_2"]
     # Default capabilities directory inside container

book/src/framework/components/chainlink/nodeset.md

@@ -68,6 +68,8 @@ Then configure NodeSet
       volume_name = ""
 
     [nodeset.node_specs.node]
+      # custom ports that plugins may need to expose and map to the host machine
+      custom_ports = [14000, 140001]
       # A list of paths to capability binaries
       capabilities = ["./capability_1", "./capability_2"]
       # Default capabilities directory inside container

book/src/framework/test_configuration_overrides.md

@@ -68,3 +68,14 @@ This helps reduce duplication in the configuration.
 
 > [!WARNING]  
 > When override slices remember that you should replace the full slice, it won't be extended by default!
+
+## Overriding Components Configuration
+
+The same override logic applies across components, files, and configuration fields in code, configs are applied in order:
+
+1. Implicit component defaults that are defined inside application
+2. Component defaults defined in the framework or external component, ex.: [CLNode](https://github.com/smartcontractkit/chainlink-testing-framework/blob/main/framework/components/clnode/default.go)
+3. `Test.*Override`
+4. `user_.*_overrides`
+
+Use `Test.*Override` in test `code` to override component configurations, and `user_.*_overrides` in `TOML` for the same purpose.

framework/components/simple_node_set/node_set.go

@@ -20,7 +20,6 @@ const (
 // Input is a node set configuration input
 type Input struct {
 	Nodes              int             `toml:"nodes" validate:"required"`
-	SkipNetworkConfig  bool            `toml:"skip_network_config"`
 	HTTPPortRangeStart int             `toml:"http_port_range_start"`
 	P2PPortRangeStart  int             `toml:"p2p_port_range_start"`
 	OverrideMode       string          `toml:"override_mode" validate:"required,oneof=all each"`
@@ -118,11 +117,9 @@ func sharedDBSetup(in *Input, bcOut *blockchain.Output, fakeUrl string, override
 		}
 		eg.Go(func() error {
 			var net string
-			if !in.SkipNetworkConfig {
-				net, err = clnode.NewNetworkCfgOneNetworkAllNodes(bcOut)
-				if err != nil {
-					return err
-				}
+			net, err = clnode.NewNetworkCfgOneNetworkAllNodes(bcOut)
+			if err != nil {
+				return err
 			}
 
 			nodeSpec := &clnode.Input{