Add Gitlab-CI for testing

.gitlab-ci.yml

@@ -3,7 +3,7 @@ image: "rust:alpine"
 services:
   - mysql:latest
 
-steps:
+stages:
   - build
   - test
 
@@ -13,10 +13,12 @@ variables:
   DATABASE_URL: mysql://root:$MYSQL_ROOT_PASSWORD@mysql/$MYSQL_DATABASE
 
 build:
+  stage: build
   script:
     - apk add zeromq
 
 test:cargo:
+  stage: test
   script:
     - rustc --version && cargo --version 
     - cargo test --all