Add build files

build/ci/drone.yml

@@ -0,0 +1,38 @@
+---
+kind: pipeline
+name: go-test
+
+steps:
+- name: test
+  image: golang:1.13
+  commands:
+  - go test -v ./...
+
+---
+kind: pipeline
+name: go-build
+
+steps:
+- name: build-obsd
+  image: golang:1.13
+  environment:
+    GOARCH: amd64
+    GOOS: openbsd
+  commands:
+  - go build ./cmd/perseus
+
+- name: build-linux
+  image: golang:1.13
+  environment:
+    GOARCH: amd64
+    GOOS: linux
+  commands:
+  - go build ./cmd/perseus
+
+- name: build-darwin
+  image: golang:1.13
+  environment:
+    GOARCH: amd64
+    GOOS: darwin
+  commands:
+  - go build ./cmd/perseus