We have done creating single page app in Angular4 and then we got a need to have index page for welcome purpose having completely different in design, loading completely different css/js files, I googled it through and got this link to put is a direction:
Serving static html outside Angular4
But when I change the name of index.html to app.html and same in .angular-cli.json, I get this error:
ERROR in Error: Child compilation failed:
Entry module not found: Error: Can't resolve '/src/index.html'