git push --set-upstream dokku@dokku:static2 master
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
	LANGUAGE = (unset),
	LC_ALL = (unset),
	LC_CTYPE = "UTF-8",
	LANG = "C.UTF-8"
    are supported and installed on your system.
perl: warning: Falling back to a fallback locale ("C.UTF-8").
Enumerating objects: 3, done.
Counting objects: 100% (3/3), done.
Writing objects: 100% (3/3), 233 bytes | 233.00 KiB/s, done.
Total 3 (delta 0), reused 0 (delta 0)
-----> Cleaning up...
-----> Building static2 from herokuish...
-----> Adding BUILD_ENV to build environment...
-----> Unable to select a buildpack
To dokku:static2
 ! [remote rejected] master -> master (pre-receive hook declined)
error: failed to push some refs to 'dokku@dokku:static2'