chore(dockerfiles): add Dockerfiles for container images (#1400)

* chore(dockerfiles): add Dockerfiles for container images

The number of dockerfiles introduced matches one to one to what
we have for other spinnaker services.

* remove java8 dockerfiles and update group / user

* renaming the binary for the docker files

This matches what io.spinnaker.package produces after
we merge #1410

Co-authored-by: Luis Pollo <1323478+luispollo@users.noreply.github.com>

Dockerfile.compile

@@ -0,0 +1,11 @@
+FROM ubuntu:bionic
+MAINTAINER sig-platform@spinnaker.io
+RUN apt-get update && apt-get install -y \
+    openjdk-8-jdk \
+    openjdk-11-jdk \
+ && rm -rf /var/lib/apt/lists/*
+ENV JAVA_HOME /usr/lib/jvm/java-11-openjdk-amd64
+ENV JDK_18 /usr/lib/jvm/java-8-openjdk-amd64
+ENV GRADLE_USER_HOME /workspace/.gradle
+ENV GRADLE_OPTS -Xmx6g
+CMD ./gradlew --no-daemon -PenableCrossCompilerPlugin=true keel-web:installDist -x test

Dockerfile.slim

@@ -0,0 +1,9 @@
+FROM alpine:3.11
+MAINTAINER sig-platform@spinnaker.io
+RUN apk --no-cache add --update bash openjdk11-jre
+RUN addgroup -S -g 10111 spinnaker
+RUN adduser -D -S spinnaker -u 10111 -G spinnaker
+COPY keel-web/build/install/keel /opt/keel
+RUN mkdir -p /opt/keel/plugins && chown -R spinnaker:nogroup /opt/keel/plugins
+USER spinnaker
+CMD ["/opt/keel/bin/keel"]

Dockerfile.ubuntu

@@ -0,0 +1,8 @@
+FROM ubuntu:bionic
+MAINTAINER sig-platform@spinnaker.io
+RUN apt-get update && apt-get -y install openjdk-11-jre-headless wget
+RUN adduser --system --uid 10111 --group spinnaker
+COPY keel-web/build/install/keel /opt/keel
+RUN mkdir -p /opt/keel/plugins && chown -R spinnaker:nogroup /opt/keel/plugins
+USER spinnaker
+CMD ["/opt/keel/bin/keel"]