Use alpine as the base for elastic image (kanisterio#547)

.goreleaser.yml

@@ -61,8 +61,6 @@ dockers:
   dockerfile: 'examples/helm/kanister/kanister-elasticsearch/image/Dockerfile'
   extra_files:
   - 'examples/helm/kanister/kanister-elasticsearch/image/esdump-setup.sh'
-  build_flag_templates:
-  - "--build-arg=TOOLS_IMAGE=kanisterio/kanister-tools:{{ .Tag }}"
 - binaries:
   - kando
   image_templates:

examples/helm/kanister/kanister-elasticsearch/image/Dockerfile

@@ -1,6 +1,10 @@
-ARG TOOLS_IMAGE
-FROM $TOOLS_IMAGE
-MAINTAINER Supriya Kharade <supriya@kasten.io>
+FROM alpine:3.11.3
 
-ADD --chmod=kanister:kanister examples/helm/kanister/kanister-elasticsearch/image/esdump-setup.sh /esdump-setup.sh
-RUN sync && bash /esdump-setup.sh
+COPY --from=restic/restic:0.9.5 /usr/bin/restic /usr/local/bin/restic
+COPY --from=kanisterio/kopia:alpine-2fb6bc8 /kopia/kopia /usr/local/bin/kopia
+ADD kando /usr/local/bin/
+
+ADD examples/helm/kanister/kanister-elasticsearch/image/esdump-setup.sh /esdump-setup.sh
+RUN chmod +x /esdump-setup.sh && sync && /esdump-setup.sh
+
+CMD [ "/usr/bin/tail", "-f", "/dev/null" ]