remove space in steps in drone.yml

.drone.yml

@@ -2,7 +2,7 @@ kind: pipeline
 name: default
 
 steps:
-  - name: build
+- name: build
   image: golang
   pull: always
   environment:
@@ -13,3 +13,7 @@ steps:
     - go version
     - go get
     - go build -ldflags '-w'
+- name: publish
+  image: plugins/docker
+  settings:
+    repo: deadbeef.codes:5000/mandelmapper