Why I am getting error "Invalid Host header", when launching website using a browser

I have created a docker droplet on digital ocean to host my application. The application is working well, when called from a browser using ip address 167.xx.xxx.xx. I have booked a domain name using godaddy and have assign ns1, ns2, ns3 in godaddy as instructed. I have also created a “A” variable in digital ocean to assign domain name to ip address I can ping the domain name (www.xxxxxxx.xyz) from command prompt and get reply, but when I use a browser to launch the application using domain name, it gives me error “Invalid Host header” I have another droplet in digital ocean, which is not a docker droplet, which works well for same setting

Please help