[BUILD] - Updated base zk image to openjdk 14.0.2 (#4)

- use openjdk 14.0.2 as base image for zk
- added github action step to build adobe/zookeeper docker image
using the zk-operator startup scripts in this repo

Author: amuraru

.github/workflows/build-push-docker.yml

@@ -1,9 +1,6 @@
 name: build-publish-docker-image
 
-on:
-  push:
-    tags:
-      - '*'
+on: [push, pull_request]
 
 jobs:
   build:
@@ -12,15 +9,22 @@ jobs:
       - uses: actions/checkout@v2
       - name: Get tag name
         id: vars
-        run: echo ::set-output name=tag::${GITHUB_REF:10}
-      - uses: docker/build-push-action@v1
+        run: |
+          ref=${GITHUB_REF:10}
+          ref="${ref////-}"
+          echo $ref
+          echo ::set-output name=tag::$ref
+      - name: Build and push zookeeper-operator image
+        uses: docker/build-push-action@v1
         with:
           dockerfile: Dockerfile
           build_args: VERSION=${{ steps.vars.outputs.tag }},GIT_SHA=${{ github.sha }}
           username: ${{ secrets.DOCKER_USERNAME }}
           password: ${{ secrets.DOCKER_PASSWORD }}
           repository: adobe/zookeeper-operator
           tag_with_ref: true
+          add_git_labels: true
+          always_pull: true
           push: ${{ startsWith(github.ref, 'refs/tags/') }}
       - name: Build and push zookeeper image
         uses: docker/build-push-action@v1
@@ -31,3 +35,5 @@ jobs:
           repository: adobe/zookeeper
           tags: 3.6.2-${{ steps.vars.outputs.tag }}
           add_git_labels: true
+          always_pull: true
+          push: ${{ startsWith(github.ref, 'refs/tags/') }}

docker/Dockerfile

@@ -8,7 +8,7 @@
 #     http://www.apache.org/licenses/LICENSE-2.0
 #
 
-FROM openjdk:11-jdk
+FROM openjdk:14.0.2-slim
 RUN mkdir /zu
 COPY zu /zu
 WORKDIR /zu
@@ -22,4 +22,4 @@ RUN chmod +x /usr/local/bin/*
 COPY --from=0 /zu/build/libs/zu.jar /root/
 
 RUN apt-get -q update && \
-    apt-get install -y dnsutils curl procps
+    apt-get install --no-install-recommends -y curl dnsutils procps