chore(build): Update Dockerfiles for new cloudbuild configs

See spinnaker/buildtool#14

I forgot this one.

Dockerfile.compile

@@ -1,3 +1,5 @@
-FROM alpine:3.7
-MAINTAINER delivery-engineering@netflix.com
-COPY ./spinnaker-monitoring-daemon /compiled_sources
+FROM alpine:3.11.3
+MAINTAINER sig-platform@spinnaker.io
+# The save_cache step will fail if these directories don't exist. We don't have
+# any compilation to do, so just do this instead of running gradle to save time.
+CMD mkdir -p .gradle/caches && mkdir -p .gradle/wrapper

Dockerfile.slim

@@ -2,10 +2,10 @@
 # config to be mounted in /opt/spinnaker-monitoring/config, which includes the
 # spinnaker-monitoring.yml file.
 FROM python:2.7.14-alpine3.7
-MAINTAINER delivery-engineering@netflix.com
+MAINTAINER sig-platform@spinnaker.io
 
-COPY --from=compile /compiled_sources/spinnaker-monitoring /opt/spinnaker-monitoring/bin
-COPY --from=compile /compiled_sources/requirements.txt /opt/spinnaker-monitoring/requirements.txt
+COPY spinnaker-monitoring-daemon/spinnaker-monitoring /opt/spinnaker-monitoring/bin
+COPY spinnaker-monitoring-daemon/requirements.txt /opt/spinnaker-monitoring/requirements.txt
 
 WORKDIR /opt/spinnaker-monitoring
 

Dockerfile.ubuntu

@@ -2,10 +2,10 @@
 # config to be mounted in /opt/spinnaker-monitoring/config, which includes the
 # spinnaker-monitoring.yml file.
 FROM ubuntu:bionic
-MAINTAINER delivery-engineering@netflix.com
+MAINTAINER sig-platform@spinnaker.io
 
-COPY --from=compile /compiled_sources/spinnaker-monitoring /opt/spinnaker-monitoring/bin
-COPY --from=compile /compiled_sources/requirements.txt /opt/spinnaker-monitoring/requirements.txt
+COPY spinnaker-monitoring-daemon/spinnaker-monitoring /opt/spinnaker-monitoring/bin
+COPY spinnaker-monitoring-daemon/requirements.txt /opt/spinnaker-monitoring/requirements.txt
 RUN apt-get update && apt-get install -y python python2.7 python-pip wget
 WORKDIR /opt/spinnaker-monitoring
 
@@ -18,4 +18,4 @@ RUN adduser --disabled-login --system --ingroup spinnaker spinnaker
 USER spinnaker
 
 ENTRYPOINT ["python", "/opt/spinnaker-monitoring/bin"]
-CMD ["--config", "/opt/spinnaker-monitoring/config/spinnaker-monitoring.yml", "monitor"]
+CMD ["--config", "/opt/spinnaker-monitoring/config/spinnaker-monitoring.yml", "monitor"]