fix typo

vs_starter/templates/docker-compose.yml

@@ -52,7 +52,7 @@ services:
       GDAL_DISABLE_READDIR_ON_OPEN: "TRUE"
       CPL_VSIL_CURL_ALLOWED_EXTENSIONS: ".TIF,.tif,.xml"
 {%- if slug in ["dem", "demF"] %}
-      ENABLE_HTTP_ACCESS: true
+      ENABLE_HTTP_ACCESS: "true"
 {%- endif %}
     configs:
       - source: init-db