feat(config): add multiple server instances support

- Add ServersConfig and ServerInstanceConfig structs
- Support configuring multiple named server instances
- Add global timeout defaults with per-instance overrides
- Add TLS configuration options (SSL cert/key, self-signed, AutoTLS)
- Add validation for server configurations
- Add helper methods for applying defaults and getting default server
- Add conversion helper to avoid import cycles

pkg/server/config_helper.go

@@ -0,0 +1,47 @@
+package server
+
+import (
+	"net/http"
+
+	"github.com/bitechdev/ResolveSpec/pkg/config"
+)
+
+// FromConfigInstanceToServerConfig converts a config.ServerInstanceConfig to server.Config
+// The handler must be provided separately as it cannot be serialized
+func FromConfigInstanceToServerConfig(sic *config.ServerInstanceConfig, handler http.Handler) Config {
+	cfg := Config{
+		Name:        sic.Name,
+		Host:        sic.Host,
+		Port:        sic.Port,
+		Description: sic.Description,
+		Handler:     handler,
+		GZIP:        sic.GZIP,
+
+		SSLCert:         sic.SSLCert,
+		SSLKey:          sic.SSLKey,
+		SelfSignedSSL:   sic.SelfSignedSSL,
+		AutoTLS:         sic.AutoTLS,
+		AutoTLSDomains:  sic.AutoTLSDomains,
+		AutoTLSCacheDir: sic.AutoTLSCacheDir,
+		AutoTLSEmail:    sic.AutoTLSEmail,
+	}
+
+	// Apply timeouts (use pointers to override, or use zero values for defaults)
+	if sic.ShutdownTimeout != nil {
+		cfg.ShutdownTimeout = *sic.ShutdownTimeout
+	}
+	if sic.DrainTimeout != nil {
+		cfg.DrainTimeout = *sic.DrainTimeout
+	}
+	if sic.ReadTimeout != nil {
+		cfg.ReadTimeout = *sic.ReadTimeout
+	}
+	if sic.WriteTimeout != nil {
+		cfg.WriteTimeout = *sic.WriteTimeout
+	}
+	if sic.IdleTimeout != nil {
+		cfg.IdleTimeout = *sic.IdleTimeout
+	}
+
+	return cfg
+}

pkg/server/manager.go

@@ -501,7 +501,7 @@ func (s *serverInstance) Start() error {
 
 		if useTLS {
 			protocol = "HTTPS"
-			logger.Info("Starting %s server '%s' on %s", protocol, s.cfg.Name, s.Addr())
+			logger.Info("Starting %s server - Name: '%s', Address: %s, Port: %d", protocol, s.cfg.Name, s.cfg.Host, s.cfg.Port)
 
 			// For AutoTLS, we need to use a TLS listener
 			if s.cfg.AutoTLS {
@@ -519,7 +519,7 @@ func (s *serverInstance) Start() error {
 				err = s.gracefulServer.server.ListenAndServeTLS(s.certFile, s.keyFile)
 			}
 		} else {
-			logger.Info("Starting %s server '%s' on %s", protocol, s.cfg.Name, s.Addr())
+			logger.Info("Starting %s server - Name: '%s', Address: %s, Port: %d", protocol, s.cfg.Name, s.cfg.Host, s.cfg.Port)
 			err = s.gracefulServer.server.ListenAndServe()
 		}