chore: update .env.example and fix remote-fetch-content sparse-checkout

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Vgmzx8VTTTmCskSpQtsLTr

.env.example

@@ -24,3 +24,8 @@ GITEA_TOKEN=your-gitea-personal-access-token
 GRAV_TEST_USER=mischa
 GRAV_TEST_PASS=TravelBlog2026!
 GRAV_BASE_URL=http://localhost:8081
+GRAV_USER_DIR=/home/mischa/Projects/travel-blog-intotheeast/user
+
+# travel-memories — Immich connection (used by the travel-memories Docker service)
+IMMICH_URL=http://192.168.1.x:2283
+IMMICH_API_KEY=your-immich-api-key

Makefile

@@ -114,7 +114,7 @@ remote-fetch:
 	$(SSH) "git -C $(SITE_CONFIG_DIR) checkout main && git -C $(SITE_CONFIG_DIR) pull"
 
 remote-fetch-content:
-	$(SSH) "git -C $(WEBROOT)/user checkout main && git -C $(WEBROOT)/user pull"
+	$(SSH) "git -C $(WEBROOT)/user fetch origin main && git -C $(WEBROOT)/user sparse-checkout disable && git -C $(WEBROOT)/user reset --hard origin/main"
 
 remote-install-plugins:
 	$(SSH) "cd $(WEBROOT) && php bin/gpm install $(shell cat plugins.txt | tr '\n' ' ') -y"