diff --git a/Docker-compose/docker-compose.yml b/Docker-compose/docker-compose.yml
index d454ef3b..ee335526 100644
--- a/Docker-compose/docker-compose.yml
+++ b/Docker-compose/docker-compose.yml
@@ -79,9 +79,9 @@ services:
       - SATOSA_PRIVATE_KEY=${SATOSA_KEYS_FOLDER:-./pki}/${SATOSA_PRIVATE_KEY_FILENAME:-privkey.pem}
       - SATOSA_PUBLIC_KEY=${SATOSA_KEYS_FOLDER:-./pki}/${SATOSA_PUBLIC_KEY_FILENAME:-cert.pem}
       - SATOSA_BASE=https://${SATOSA_HOSTNAME:-localhost}
-      - SATOSA_BASE_STATIC=https://${SATOSA_HOSTNAME:-localhost}/static
-      - SATOSA_DISCO_SRV=https://${SATOSA_HOSTNAME:-localhost}/static/disco.html
-      - SATOSA_UNKNOW_ERROR_REDIRECT_PAGE=https://${SATOSA_HOSTNAME:-localhost}/static/error_page.html
+      - SATOSA_BASE_STATIC=${SATOSA_BASE}/static
+      - SATOSA_DISCO_SRV=${SATOSA_BASE_STATIC}/disco.html
+      - SATOSA_UNKNOW_ERROR_REDIRECT_PAGE=${SATOSA_BASE_STATIC}/error_page.html
       
       - MONGODB_USERNAME=${MONGO_DBUSER:-satosa}
       - MONGODB_PASSWORD=${MONGO_DBPASSWORD:-thatpassword}
diff --git a/Docker-compose/env.example b/Docker-compose/env.example
index b71edc39..6a15f3c2 100644
--- a/Docker-compose/env.example
+++ b/Docker-compose/env.example
@@ -1,4 +1,8 @@
 SATOSA_HOSTNAME=localhost
+# SATOSA_BASE=https://${SATOSA_HOSTNAME:-localhost}
+# SATOSA_BASE_STATIC=${SATOSA_BASE}/static
+# SATOSA_DISCO_SRV=${SATOSA_BASE_STATIC}/disco.html
+# SATOSA_UNKNOW_ERROR_REDIRECT_PAGE=${SATOSA_BASE_STATIC}/error_page.html
 
 # Set Time Zone
 TZ="Europe/Rome"
diff --git a/example/proxy_conf.yaml b/example/proxy_conf.yaml
index 0211bd13..b13046d9 100644
--- a/example/proxy_conf.yaml
+++ b/example/proxy_conf.yaml
@@ -18,7 +18,7 @@ cookies_samesite_compat:
 # DEPRECATED, use hasher microservice instead
 USER_ID_HASH_SALT: !ENV SATOSA_SALT
 
-ERROR_URL: "https://localhost/static/error_page.html"
+ERROR_URL: !ENV SATOSA_UNKNOW_ERROR_REDIRECT_PAGE
 
 CUSTOM_PLUGIN_MODULE_PATHS:
   #- "plugins/ping"