diff --git a/docs/configuracao.md b/docs/configuracao.md
index cd7ddfe..b04d788 100644
--- a/docs/configuracao.md
+++ b/docs/configuracao.md
@@ -18,8 +18,9 @@ instalador, seus valores são usados como **padrão** nos formulários.
 | `timeout_seconds` | Servidor → Timeout            | Em segundos. Padrão `30`.                                    |
 | `environment`     | Servidor → Ambiente           | `development` ou `production`.                                |
 
-> **Atenção:** o campo "Porta" do formulário define a porta exposta no host, não a
-> porta interna. O `config.toml` sempre grava `port = 8080`.
+> **Atenção:** o campo "Porta (host)" do formulário define a porta exposta no host,
+> não a porta interna. O `config.toml` sempre grava `port = 8080` (constante
+> `containerAppPort` em `docker.go`).
 
 ### `[database]`
 
diff --git a/internal/tui/config.go b/internal/tui/config.go
index 308a9b5..ebb2e5c 100644
--- a/internal/tui/config.go
+++ b/internal/tui/config.go
@@ -13,7 +13,9 @@ func GenerateConfigTOML(cv ConfigValues) (string, error) {
 	// [server]
 	sb.WriteString("# Server Configuration\n")
 	sb.WriteString("[server]\n")
-	sb.WriteString("port = 8080\n")
+	// Always containerAppPort: the container listens on this port internally; the
+	// user's port is the host-side mapping (see RunAppClienteContainer).
+	sb.WriteString(fmt.Sprintf("port = %d\n", containerAppPort))
 	sb.WriteString(fmt.Sprintf("timeout_seconds = %s\n", cv.Server["timeout"]))
 	sb.WriteString(fmt.Sprintf("environment = %q\n", cv.Server["environment"]))
 	sb.WriteString("\n")
diff --git a/internal/tui/docker.go b/internal/tui/docker.go
index 133ca9c..b81142c 100644
--- a/internal/tui/docker.go
+++ b/internal/tui/docker.go
@@ -11,6 +11,10 @@ import (
 
 const networkName = "app-dono_app"
 
+// containerAppPort is the port the app cliente container listens on internally.
+// The user-provided port is only the host-side mapping (<host port>:containerAppPort).
+const containerAppPort = 8080
+
 func RunContainer(image string, name string, port int) error {
 
 	cmd := exec.Command(
@@ -123,7 +127,7 @@ func RunAppClienteContainer(image, containerName, configPath, configDestinationP
 	args := []string{
 		"run", "-d",
 		"-u", uidGid,
-		"-p", fmt.Sprintf("%s:8080", cv.Server["port"]),
+		"-p", fmt.Sprintf("%s:%d", cv.Server["port"], containerAppPort),
 		"--name", containerName,
 		"--network", networkName,
 		"--restart", "unless-stopped",
diff --git a/internal/tui/model.go b/internal/tui/model.go
index fe393c8..ad7ccc5 100644
--- a/internal/tui/model.go
+++ b/internal/tui/model.go
@@ -172,7 +172,7 @@ func InitialModel() Model {
 		serverForm: NewFormStep("Servidor", []FormField{
 			{
 				Id:          "port",
-				Label:       "Porta",
+				Label:       "Porta (host)",
 				Placeholder: "8081",
 				Default:     strconv.FormatInt(cfg.Server.Port, 10),
 				Type:        FieldTypeNumber,