ci: add sast step to pipeline (!87)

https://gitlab.com/hectorjsmith/fail2ban-prometheus-exporter/-/merge_requests/87

.gitlab-ci.yml

@@ -6,6 +6,12 @@ stages:
 .go_template:
   image: golang:latest
 
+sast:
+  stage: test
+
+include:
+- template: Security/SAST.gitlab-ci.yml
+
 dependencies:
   extends: .go_template
   stage: test