Update CI for stack.yaml

Signed-off-by: Alex Ellis (OpenFaaS Ltd) <alexellis2@gmail.com>

Author: alexellis

verify.sh

@@ -6,10 +6,11 @@ CLI="faas-cli"
 build_template() {
     template=$1
 
+    rm -rf stack.yaml || :
     echo Building $template
     func_name=$template-ci
     $CLI new $func_name --lang $template 2>/dev/null 1>&2
-    $CLI build -f $func_name.yml
+    $CLI build
 }
 
 verify_and_clean() {
@@ -74,4 +75,5 @@ done
 
 # remove the generated files and folders if successful
 cd ../
-rm -rf *-ci *-ci.yml
+rm -rf *-ci stack.yaml
+