Add GitLab CI configuration

.gitlab-ci.yml

@@ -0,0 +1,20 @@
+variables:
+  CARGO_HOME: $CI_PROJECT_DIR/.cargo
+
+.cached: &cached
+  cache:
+    key: $CI_COMMIT_REF_NAME
+    untracked: true
+    paths:
+      - target/
+      - .cargo/
+
+.test_job: &test_job
+  <<: *cached
+  environment: test
+
+test:rust_1_23_0:
+  <<: *test_job
+  image: "rust:1.23.0"
+  script:
+    - cargo test --all

README.md

@@ -1,3 +1,5 @@
+[![pipeline status][gitlab-ci-badge]][gitlab-repo-master]
+
 # Discord RPC Client
 
 Discord RPC client for Rust
@@ -16,3 +18,6 @@ discord-rpc-client = "^0.1"
 ## Examples
 
 Examples can be found in the examples directory in this repo.
+
+[gitlab-ci-badge]: https://gitlab.com/valeth/discord-rpc-client.rs/badges/master/pipeline.svg
+[gitlab-repo-master]: https://gitlab.com/valeth/discord-rpc-client.rs/commits/master