fix(route): enhance host parsing with port suffix support

- Added logic to strip the trailing :port from the host when searching for routes.
- Updated findRouteByDomains function to ensure consistent host formatting.
- Added related tests

internal/entrypoint/entrypoint.go

@@ -146,11 +146,18 @@ func findRouteAnyDomain(host string) types.HTTPRoute {
 	if r, ok := routes.HTTP.Get(host); ok {
 		return r
 	}
+	// try striping the trailing :port from the host
+	if before, _, ok := strings.Cut(host, ":"); ok {
+		if r, ok := routes.HTTP.Get(before); ok {
+			return r
+		}
+	}
 	return nil
 }
 
 func findRouteByDomains(domains []string) func(host string) types.HTTPRoute {
 	return func(host string) types.HTTPRoute {
+		host, _, _ = strings.Cut(host, ":") // strip the trailing :port
 		for _, domain := range domains {
 			if target, ok := strings.CutSuffix(host, domain); ok {
 				if r, ok := routes.HTTP.Get(target); ok {

internal/entrypoint/entrypoint_test.go

@@ -128,3 +128,47 @@ func TestFindRouteByDomainsExactMatch(t *testing.T) {
 
 	run(t, tests, testsNoMatch)
 }
+
+func TestFindRouteWithPort(t *testing.T) {
+	t.Run("AnyDomain", func(t *testing.T) {
+		addRoute("app1")
+		addRoute("app2.com")
+
+		tests := []string{
+			"app1:8080",
+			"app1.domain.com:8080",
+			"app2.com:8080",
+		}
+		testsNoMatch := []string{
+			"app11",
+			"app2.co",
+			"app2.co:8080",
+		}
+		run(t, tests, testsNoMatch)
+	})
+
+	t.Run("ByDomains", func(t *testing.T) {
+		ep.SetFindRouteDomains([]string{
+			".domain.com",
+		})
+		addRoute("app1")
+		addRoute("app2")
+		addRoute("app3.domain.com")
+
+		tests := []string{
+			"app1.domain.com:8080",
+			"app2:8080", // exact match fallback
+			"app3.domain.com:8080",
+		}
+		testsNoMatch := []string{
+			"app11",
+			"app1.domain.co",
+			"app1.domain.co:8080",
+			"app2.co",
+			"app2.co:8080",
+			"app3.domain.co",
+			"app3.domain.co:8080",
+		}
+		run(t, tests, testsNoMatch)
+	})
+}