ci: Add initial pipeline

.drone.yml

@@ -0,0 +1,21 @@
+---
+kind: pipeline
+type: docker
+name: default
+
+steps:
+  - name: Build
+    image: crystallang/crystal:1.7.1
+    volumes:
+      - name: cache
+        path: /stupid
+    commands:
+      - pwd
+      - apt-get update && apt-get install -y cmake g++
+      - shards install
+      - shards build
+
+volumes:
+  - name: cache
+    temp: {}
+#