rework current front facing proxy (#40)

* replace previous caddy construct with kopano kweb
* add kweb to makefile
* greatly simplifies setup, if user wants to tweak config of kweb he could do so in git and make a local build. Fixes #22 
* ping kweb version
* update readme
* remove build argument from docker-compose for web and ldap-demo
* fix certificate handling in kweb. fixes #38

Makefile

@@ -53,6 +53,12 @@ build-zpush:
 build-ssl:
 	docker build -t $(docker_repo)/kopano_ssl ssl/
 
+build-kweb:
+	docker build -t $(docker_repo)/kopano_web kweb/
+
+build-ldap-demo:
+	docker build -t $(docker_repo)/kopano_ldap_demo ldap-demo/
+
 tag: component ?= base
 tag:
 	@echo 'create tag $($(component)_version)'
@@ -103,6 +109,9 @@ publish-zpush: build-zpush tag-zpush
 publish-ssl: build-ssl
 	docker push $(docker_repo)/kopano_ssl:latest
 
+publish-kweb: build-kweb
+	docker push $(docker_repo)/kopano_web:latest
+
 test:
 	sudo rm -rf data/
 	make build-all