diff --git a/droplet/.env.production b/droplet/.env.production
index 99613d4..603ff38 100644
--- a/droplet/.env.production
+++ b/droplet/.env.production
@@ -2,14 +2,14 @@ USER_ID=1000
 
 # Index GUI
 TORRUST_INDEX_GUI_API_BASE_URL='https://index.torrust-demo.com/api/v1'
-NITRO_HOST="0.0.0.0"
+NITRO_HOST=0.0.0.0
 NITRO_PORT=3000
 
 # Index
 TORRUST_INDEX_CONFIG_TOML=
-TORRUST_INDEX_CONFIG_OVERRIDE_TRACKER__TOKEN='MyAccessToken'
-TORRUST_INDEX_CONFIG_OVERRIDE_AUTH__SECRET_KEY='MyAccessToken'
 TORRUST_INDEX_API_CORS_PERMISSIVE=false
+TORRUST_INDEX_CONFIG_OVERRIDE_AUTH__SECRET_KEY='MaxVerstappenWC2021'
+TORRUST_INDEX_CONFIG_OVERRIDE_TRACKER__TOKEN='MyAccessToken'
 
 # Tracker
 TORRUST_TRACKER_CONFIG_TOML=
diff --git a/droplet/compose.yaml b/droplet/compose.yaml
index 5f6dc06..61a9ad3 100644
--- a/droplet/compose.yaml
+++ b/droplet/compose.yaml
@@ -74,6 +74,7 @@ services:
       - TORRUST_INDEX_DATABASE=${TORRUST_INDEX_DATABASE:-sqlite3}
       - TORRUST_INDEX_DATABASE_DRIVER=${TORRUST_INDEX_DATABASE_DRIVER:-sqlite3}
       - TORRUST_INDEX_CONFIG_OVERRIDE_TRACKER__TOKEN=${TORRUST_INDEX_CONFIG_OVERRIDE_TRACKER__TOKEN:-MyAccessToken}
+      - TORRUST_INDEX_CONFIG_OVERRIDE_AUTH__SECRET_KEY=${TORRUST_INDEX_CONFIG_OVERRIDE_AUTH__SECRET_KEY:-MaxVerstappenWC2021}
       - TORRUST_INDEX_API_CORS_PERMISSIVE=${TORRUST_INDEX_API_CORS_PERMISSIVE:-true}
     networks:
       - backend_network
diff --git a/droplet/share/container/default/config/index.prod.container.sqlite3.toml b/droplet/share/container/default/config/index.prod.container.sqlite3.toml
index 4d9b53d..608bd05 100644
--- a/droplet/share/container/default/config/index.prod.container.sqlite3.toml
+++ b/droplet/share/container/default/config/index.prod.container.sqlite3.toml
@@ -1,16 +1,10 @@
-# Please override the tracker token: 
-# `TORRUST_INDEX_CONFIG_OVERRIDE_TRACKER__TOKEN`
-# And the auth screte key:
-# `TORRUST_INDEX_CONFIG_OVERRIDE_AUTH__SECRET_KEY`
-# environmental variables!
-
 [tracker]
-url = "udp://tracker.torrust-demo.com:6969"
 api_url = "http://tracker:1212"
+url = "udp://tracker.torrust-demo.com:6969"
 
 [database]
 connect_url = "sqlite:///var/lib/torrust/index/database/sqlite3.db?mode=rwc"
 
-[mail]
-server = "mailcatcher"
+[mail.smtp]
 port = 1025
+server = "mailcatcher"