Update pipeline

.drone.yml

@@ -1,9 +1,39 @@
+---
 kind: pipeline
 type: kubernetes
-name: default
+name: build-linux-amd64
 
 steps:
   - name: build
     image: golang:1.17
+    environment:
+      GOOS: linux
+      GOARCH: amd64
     commands:
-      - go build
+      - "go build -o covergen_$GOOS-$GOARCH ./cmd/covergen"
+---
+kind: pipeline
+type: kubernetes
+name: build-darwin-amd64
+
+steps:
+  - name: build
+    image: golang:1.17
+    environment:
+      GOOS: darwin
+      GOARCH: amd64
+    commands:
+      - "go build -o covergen_$GOOS-$GOARCH ./cmd/covergen"
+---
+kind: pipeline
+type: kubernetes
+name: build-wasm
+
+steps:
+  - name: build
+    image: golang:1.17
+    environment:
+      GOOS: js
+      GOARCH: wasm
+    commands:
+      - make wasm