Add CI script

.drone.yml

@@ -0,0 +1,20 @@
+---
+kind: pipeline
+type: docker
+name: default
+
+steps:
+- name: cargo_check
+  image: rust
+  commands:
+  - cargo check
+- name: cargo_test
+  image: rust
+  commands:
+  - cargo test 
+- name: cargo_clippy
+  image: rust
+  commands:
+  - rustup component add clippy
+  - cargo clippy
+