feat: allow port to be set in config

internal/service/config.go

@@ -7,12 +7,15 @@ import (
 )
 
 type Config struct {
+	Port                  int    `json:"port"`
 	DatabasePath          string `json:"databasePath"`
 	TemplateDirectoryPath string `json:"templateDirectoryPath"`
 	HostKeyDirectoryPath  string `json:"hostKeyDirectoryPath"`
 	HostName              string `json:"hostName"`
 }
 
+const defaultPort = 8080
+
 func ReadConfigFrom(reader io.Reader) (Config, error) {
 	var config Config
 	err := json.NewDecoder(reader).Decode(&config)
@@ -35,5 +38,9 @@ func ReadConfigFrom(reader io.Reader) (Config, error) {
 		return Config{}, err
 	}
 
+	if config.Port == 0 {
+		config.Port = defaultPort
+	}
+
 	return config, nil
 }

main.go

@@ -103,5 +103,5 @@ func main() {
 		_ = c.NoContent(http.StatusInternalServerError)
 	}
 
-	apiServer.Logger.Fatal(apiServer.Start(":8080"))
+	apiServer.Logger.Fatal(apiServer.Start(fmt.Sprintf(":%d", config.Port)))
 }