Add example compose file to run Meet without Kopano (#217)

* Add example compose file to run Meet without Kopano
* add readme 
* add an example env file
* add setup.sh so user can easily create their own
* use kopano repo by default

konnect/Dockerfile

@@ -5,6 +5,7 @@ ARG VCS_REF
 ARG CODE_VERSION
 
 ENV CODE_VERSION="${CODE_VERSION}"
+ENV KONNECT_BACKEND="kc"
 
 LABEL maintainer=az@zok.xyz \
     org.label-schema.name="Kopano Konnect container" \

konnect/wrapper.sh

@@ -39,4 +39,4 @@ exec konnectd serve \
 	--iss=https://"$FQDN" \
 	--identifier-registration-conf /kopano/ssl/konnectd-identifier-registration.yaml \
 	--identifier-scopes-conf /etc/kopano/konnectd-identifier-scopes.yaml \
-	"$@" kc
+	"$@" "$KONNECT_BACKEND"