dima/go-common: Сommon libraries @ v1.3.0

Dima 45e7f4e539 Add CORS middleware		4 月之前
..
cors.go	45e7f4e539 Add CORS middleware	4 月之前
cors_config.go	45e7f4e539 Add CORS middleware	4 月之前
readme.md	45e7f4e539 Add CORS middleware	4 月之前

		
				readme.md
			
				Usage example

corsMiddleware, err := cors.NewCORSMiddleware(
    cors.NewConfig(
        cors.WithOrigin("test.com"),
        cors.WithMethods("GET,POST"),        
    ),
)

if err != nil {
    // TODO
}

srv = &http.Server{
    Addr:    ":8080",
    Handler: corsMiddleware.Handle(mux),
}