@import play.api.Play
@import play.api.Play.current

@()
<footer>
    <div>
        @if(Play.configuration.getString("buildNumber").isEmpty) {
            <p><a href="https://github.com/gitlinks/git-rank-project">Contribute on Github</a> - Dev build</p>
        } else {
            <p><a href="https://github.com/gitlinks/git-rank-project">Contribute on Github</a> - Build #@Play.configuration.getString("buildNumber")</p>
        }
    </div>
</footer>

@import play.api.Play
@import play.api.Play.current

@()
<footer>
    <div>
        @if(Play.configuration.getString("buildNumber").isEmpty) {
            <p><a href="https://github.com/gitlinks/gitrank-web">Contribute on Github</a> - Dev build</p>
        } else {
            <p><a href="https://github.com/gitlinks/gitrank-web">Contribute on Github</a> - Build #@Play.configuration.getString("buildNumber")</p>
        }
    </div>
</footer>

Update contribute on github url
Update contribute on github url