fix repocard issues (#20)

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>

api/resolver/subdomain/subdomain.go

@@ -46,7 +46,7 @@ func (r *Resolver) Domain(req *http.Request) string {
 		return ""
 	}
 
-	// check for dev enviroment
+	// check for dev environment
 	if host == "localhost" || host == "127.0.0.1" {
 		return ""
 	}

api/server/acme/options.go

@@ -56,7 +56,7 @@ func OnDemand(b bool) Option {
 
 // Cache provides a cache / storage interface to the underlying ACME library
 // as there is no standard, this needs to be validated by the underlying
-// implentation.
+// implementation
 func Cache(c interface{}) Option {
 	return func(o *Options) {
 		o.Cache = c