Added gitlab-ci.yml

Signed-off-by: Louis Vallat <louis@louis-vallat.xyz>

.gitlab-ci.yml

@@ -0,0 +1,15 @@
+default:
+  image: rust
+
+stages:
+  - build
+
+metallica-the-unforgiven:
+  stage: build
+  script:
+    - cargo run --release -- ${THE_UNFORGIVEN_INPUT}
+
+eagles-hotel-california:
+  stage: build
+  script:
+    - cargo run --release -- ${HOTEL_CALIFORNIA_INPUT}