optimized api new with absolute path like: goctl api new $PWD/xxxx (#67)

* rebase upstream

* rebase

* trim no need line

* trim no need line

* trim no need line

* update doc

* remove update

* optimized api new with absolute path like: goctl api new $PWD/xxxx

* optimized api new with absolute path like: goctl api new $PWD/xxxx

* optimized api new with absolute path like: goctl api new $PWD/xxxx

* optimized api new with absolute path like: goctl api new $PWD/xxxx

Co-authored-by: kingxt <dream4kingxt@163.com>

tools/goctl/api/gogen/genmain.go

@@ -16,6 +16,7 @@ const mainTemplate = `package main
 
 import (
 	"flag"
+	"fmt"
 
 	{{.importPackages}}
 )
@@ -33,6 +34,8 @@ func main() {
 	defer server.Stop()
 
 	handler.RegisterHandlers(server, ctx)
+
+	fmt.Printf("Starting server at %s:%d...\n", c.Host, c.Port)
 	server.Start()
 }
 `