feat: expose per-network Aliases to templates (#171)

The docker client already reports a container's per-network aliases
(docker.ContainerNetwork.Aliases), but they were discarded when building the
template context. Add an Aliases field to context.Network and populate it from
NetworkSettings.Networks so templates can generate DNS / vhost config keyed on
a container's network aliases.

Fixes #171

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Author: JamBalaya56562

README.md

@@ -282,6 +282,7 @@ type Address struct {
 type Network struct {
     IP                  string
     Name                string
+    Aliases             []string
     Gateway             string
     EndpointID          string
     IPv6Gateway         string

internal/context/context.go

@@ -55,6 +55,7 @@ func SetDockerEnv(d *docker.Env) {
 type Network struct {
 	IP                  string
 	Name                string
+	Aliases             []string
 	Gateway             string
 	EndpointID          string
 	IPv6Gateway         string

internal/generator/generator.go

@@ -460,6 +460,7 @@ func (g *generator) getContainers(config config.Config) ([]*context.RuntimeConta
 			network := context.Network{
 				IP:                  v.IPAddress,
 				Name:                k,
+				Aliases:             append([]string{}, v.Aliases...),
 				Gateway:             v.Gateway,
 				EndpointID:          v.EndpointID,
 				IPv6Gateway:         v.IPv6Gateway,