Expanding the scope of official docker registry auth

Author: githubsaturn

src/user/DockerRegistryHelper.ts

@@ -133,18 +133,25 @@ class DockerRegistryHelper {
                     }
                 }
 
+                function isDomainDocker(domainToTest: string) {
+                    return (
+                        domainToTest.endsWith('.docker.io') || // *.docker.io/user/image is from Docker Hub
+                        domainToTest.endsWith('.docker.com') || // *.docker.com/user/image is from Docker Hub
+                        domainToTest === 'docker.com' || // docker.com/user/image is from Docker Hub
+                        domainToTest === 'docker.io' // docker.io/user/image is from Docker Hub
+                    )
+                }
+
                 // if none of the registries explicitly relates to the image name, and no other explicit domain is defined,
                 // try Docker Hub registry as the default
                 if (
+                    imageName.split('/').length == 1 || // image is from Docker Hub
                     imageName.split('/').length == 2 || // user/image is from Docker Hub
-                    imageName.split('/')[0].endsWith('.docker.io') || // registry-1.docker.io/user/image is from Docker Hub
-                    imageName.split('/')[0] === 'docker.io' || // registry-1.docker.io/user/image is from Docker Hub
-                    imageName.split('/')[0].endsWith('.docker.com') || // hub.docker.com/user/image is from Docker Hub
-                    imageName.split('/')[0] === 'docker.io' // hub.docker.com/user/image is from Docker Hub
+                    isDomainDocker(imageName.split('/')[0])
                 )
                     for (let index = 0; index < regs.length; index++) {
                         const element = regs[index]
-                        if (element.registryDomain === 'registry-1.docker.io') {
+                        if (isDomainDocker(element.registryDomain)) {
                             return {
                                 serveraddress: element.registryDomain,
                                 username: element.registryUser,