add dedicated docker container for some utils

fixes https://github.com/zokradonh/kopano-docker/issues/57

Signed-off-by: Felix Bartels <felix@host-consultants.de>

Makefile

@@ -23,7 +23,7 @@ export
 # convert lowercase componentname to uppercase
 COMPONENT = $(shell echo $(component) | tr a-z A-Z)
 
-build-all: build-ssl build-base build-core build-webapp build-zpush build-kweb build-ldap-demo
+build-all: build-ssl build-base build-core build-utils build-webapp build-zpush build-kweb build-ldap-demo
 
 build: component ?= base
 build:
@@ -46,6 +46,9 @@ build-base:
 build-core:
 	component=core make build
 
+build-utils:
+	component=utils make build
+
 build-webapp:
 	component=webapp make build
 

utils/Dockerfile

@@ -0,0 +1,9 @@
+ARG docker_repo=zokradonh
+FROM ${docker_repo}/kopano_core
+
+RUN apt update && apt-get install --no-install-recommends -y \
+    kopano-backup \
+    kopano-migration-imap \
+    kopano-migration-pst
+
+CMD [ "/bin/bash" ]