Prevent CI job prepare:back to try spinning dependant services

Author: David Ferlay

Makefile

@@ -75,7 +75,11 @@ endif
 
 ## Install backend dependencies
 back:
-	docker-compose up -d --remove-orphans php # PHP container is required for composer
+	docker-compose up -d --remove-orphans --no-deps php # PHP container is required for composer
+ifneq ($(strip $(ADD_PHP_EXT)),)
+# Install additional php extensions as this goal used in CI (todo stop doing it)
+	$(call php-0, apk add --no-cache $(ADD_PHP_EXT))
+endif
 ifeq ($(INSTALL_DEV_DEPENDENCIES), TRUE)
 	@echo "INSTALL_DEV_DEPENDENCIES=$(INSTALL_DEV_DEPENDENCIES)"
 	@echo "Installing composer dependencies, including dev ones"