Update image url

Author: nikoshell

Makefile

@@ -6,7 +6,7 @@ VPS_HOST  ?= static.europython.eu
 VPS_PROD_PATH  ?= /home/static_content_user/content/europython_websites/ep2026
 VPS_PREVIEW_PATH  ?= /home/static_content_user/content/previews
 REMOTE_CMD=ssh $(VPS_USER)@$(VPS_HOST)
-PREVIEW_SITE_URL ?= "https://$(SAFE_BRANCH).ep-preview.click"
+PREVIEW_SITE_URL ?= https://$(SAFE_BRANCH).ep-preview.click
 
 # Variables for build/deploy
 # ==========================
@@ -20,7 +20,7 @@ BRANCH ?= $(shell git rev-parse --abbrev-ref HEAD)
 # Replace "/" and other non-alphanumeric characters with "-"
 SAFE_BRANCH := $(shell echo "$(BRANCH)" | tr '[:upper:]' '[:lower:]' | sed 's/[^a-z0-9-]/-/g')
 FORCE_DEPLOY ?= false
-SITE_URL ?= "https://$(SAFE_BRANCH).ep-preview.click"
+SITE_URL ?= https://$(SAFE_BRANCH).ep-preview.click
 
 .PHONY: build deploy dev clean install
 
@@ -48,8 +48,8 @@ build:
 
 preview: RELEASES_DIR = $(VPS_PREVIEW_PATH)/$(SAFE_BRANCH)/releases
 preview: TARGET = $(RELEASES_DIR)/$(TIMESTAMP)
-preview: build
 preview:
+	SITE_URL=$(SITE_URL) $(MAKE) build
 	@echo "Preview site URL: $(PREVIEW_SITE_URL)"
 	echo $(TARGET)
 	@echo "\n\n**** Deploying preview of a branch '$(BRANCH)' (safe: $(SAFE_BRANCH)) to $(TARGET)...\n\n"