Added rustup commands

.gitlab-ci.yml

@@ -1,5 +1,15 @@
-stable:cargo:
+stages:
-  image: rustdocker/rust:stable
+  - build
+  - test
+
+stable:cargo:build:
+  stage: build
+  script:
+    - rustup toolchain install stable
+    - rustup default stable
+    - cargo build
+
+stable:cargo:test:
   stage: test
   script:
     - cargo test --verbose --jobs 1