fix: resolve network mode SSE and logging issues

- Fixes 404 errors on /sse and /message endpoints in network mode.
- Updates dev container and go.mod to use a compatible Go version.
- Restores and improves startup logging for all transport modes.

go.mod

@@ -1,6 +1,8 @@
 module gitea.com/gitea/gitea-mcp
 
-go 1.24.0
+go 1.23.0
+
+toolchain go1.23.11
 
 require (
 	code.gitea.io/sdk/gitea v0.21.0

operation/operation.go

@@ -43,6 +43,8 @@ func RegisterTool(s *server.MCPServer) {
 func Run() error {
 	mcpServer = newMCPServer(flag.Version)
 	RegisterTool(mcpServer)
+	addr := fmt.Sprintf("127.0.0.1:%d", flag.Port)
+
 	switch flag.Mode {
 	case "stdio":
 		if err := server.ServeStdio(mcpServer); err != nil {
@@ -50,29 +52,45 @@ func Run() error {
 		}
 	case "sse":
 		sseServer := server.NewSSEServer(mcpServer)
-		log.Infof("Gitea MCP SSE server listening on :%d", flag.Port)
+		log.Infof("Gitea MCP Server running:")
+		log.Infof("        sse: http://%s/", addr)
 		if err := sseServer.Start(fmt.Sprintf(":%d", flag.Port)); err != nil {
 			return err
 		}
 	case "http":
 		httpServer := server.NewStreamableHTTPServer(mcpServer)
-		log.Infof("Gitea MCP HTTP server listening on :%d", flag.Port)
+		log.Infof("Gitea MCP Server running:")
+		log.Infof("        http: http://%s/", addr)
 		if err := httpServer.Start(fmt.Sprintf(":%d", flag.Port)); err != nil {
 			return err
 		}
 	case "network":
 		// Network mode: serve both HTTP and SSE on same port with different URLs
+		log.Infof("Network mode: Creating streamable HTTP server...")
 		streamableServer := server.NewStreamableHTTPServer(mcpServer)
-		sseServer := server.NewSSEServer(mcpServer)
+		log.Infof("Network mode: Created streamable HTTP server")
+
+		log.Infof("Network mode: Creating SSE server...")
+		sseServer := server.NewSSEServer(mcpServer,
+			server.WithSSEEndpoint("/sse"),
+			server.WithMessageEndpoint("/message"),
+		)
+		log.Infof("Network mode: Created SSE server")
 
 		// Create custom HTTP mux
+		log.Infof("Network mode: Creating HTTP mux...")
 		mux := http.NewServeMux()
 		mux.Handle("/mcp", streamableServer)
-		mux.Handle("/sse", sseServer)
+		mux.Handle("/", sseServer)
+		log.Infof("Network mode: Configured HTTP routes")
 
 		// Start single HTTP server
-		log.Infof("Gitea MCP server listening on :%d (/mcp, /sse)", flag.Port)
+		log.Infof("Gitea MCP Server running in network mode:")
-		return http.ListenAndServe(fmt.Sprintf(":%d", flag.Port), mux)
+		log.Infof("        http: http://%s/mcp", addr)
+		log.Infof("        sse:  http://%s/sse", addr)
+		err := http.ListenAndServe(fmt.Sprintf(":%d", flag.Port), mux)
+		log.Errorf("Network mode: ListenAndServe returned with error: %v", err)
+		return err
 	default:
 		return fmt.Errorf("invalid transport type: %s. Must be 'stdio', 'sse', 'http' or 'network'", flag.Mode)
 	}

pkg/log/log.go

@@ -45,7 +45,7 @@ func Default() *zap.Logger {
 				MaxAge:     30,
 			}))
 
-			if flag.Mode == "http" || flag.Mode == "sse" {
+			if flag.Mode == "http" || flag.Mode == "sse" || flag.Mode == "network" {
 				wss = append(wss, zapcore.AddSync(os.Stdout))
 			}