Fix drone, x86 build

.drone.yml

@@ -5,17 +5,14 @@ workspace:
 pipeline:
   build:
     image: golang:latest
-    environment:
-      - GOOS=linux
-      - GOARCH=arm
-      - GOARM=7
     commands:
       - go version
       - go get
-      - go build
+      - CGO_ENABLED=0 GOOS=linux go build -ldflags '-w'
   publish:
     image: plugins/docker
     repo: deadbeef.codes:5000/mandelmapper
     registry: deadbeef.codes:5000
-    auto_tag: true
-    auto_tag_suffix: ${DRONE_COMMIT}
+    tags:
+      - latest
+      - ${DRONE_COMMIT}