update depreciated MAINTAINER field (#1276)

twstewart42 · web-flow · commit f6c51abff642 · 2021-01-04T11:52:08.000+01:00
diff --git a/docker/Dockerfile b/docker/Dockerfile
@@ -1,5 +1,5 @@
 FROM alpine
-MAINTAINER Team ACID @ Zalando <team-acid@zalando.de>
+LABEL maintainer="Team ACID @ Zalando <team-acid@zalando.de>"
 
 # We need root certificates to deal with teams api over https
 RUN apk --no-cache add curl
