- add drone config

.drone.yml

@@ -0,0 +1,13 @@
+kind: pipeline
+type: docker
+name: CI
+steps:
+  - name: Build
+    image: mcr.microsoft.com/dotnet/sdk:5.0
+    commands:
+    - dotnet build
+  
+  - name: Test
+    image: mcr.microsoft.com/dotnet/sdk:5.0
+    commands:
+    - dotnet test