added CI

.gitlab-ci.yml

@@ -0,0 +1,27 @@
+image: "rust:latest"
+
+default:
+  before_script:
+    - rustc --version 
+    - cargo --version
+
+stages:
+  - test
+
+lint-code:
+  stage: test
+  script:
+    - rustup component add clippy
+    - cargo clippy -- -D warnings
+    
+format-code:
+  stage: test
+  script:
+    - rustup component add rustfmt
+    - cargo fmt -- --check
+
+audit-code:
+  stage: test
+  script:
+    - cargo install cargo-audit
+    - cargo audit