sample config: update

Signed-off-by: Sumner Evans <[email protected]>

config.sample.yaml

@@ -1,11 +1,3 @@
-# All of these configuration values can be specified via environment variables
-# as well. Just prefix them with "MINESHSPC_" and upper-case the keys.
-#
-# For example:
-#
-#   domain -> MINESHSPC_DOMAIN
-#   recaptcha.site_key -> MINESHSPC_RECAPTCHA_SITE_KEY
-
 # ===== Database Settings =====
 database:
   # The database type. Only "sqlite3" is supported.
@@ -28,6 +20,8 @@ dev_mode: false
 
 sendgrid_api_key: SENDGRID_API_KEY
 
+healthcheck_url: null
+
 # This will be shown in the footer right after the link to the source code.
 hosted_by_html: |
   Hosting provided by YOUR COMPANY HERE.