diff --git a/conf/.env b/conf/.env
new file mode 100644
index 0000000..04f60c3
--- /dev/null
+++ b/conf/.env
@@ -0,0 +1,3 @@
+MIX_ENV=prod
+FLAVOUR=classic
+HOSTNAME=__DOMAIN__
\ No newline at end of file
diff --git a/scripts/install b/scripts/install
index 0478f81..d04f539 100644
--- a/scripts/install
+++ b/scripts/install
@@ -59,6 +59,16 @@ ynh_replace_string --match_string="PUBLIC_PORT=4000" --replace_string="PUBLIC_PO
 # max file upload size
 UPLOAD_LIMIT="${media_upload_size:0:2}000000" # convert the MB argument in bytes
 
+#=================================================
+# ADD A CONFIGURATION
+#=================================================
+ynh_script_progression --message="Adding a configuration file..." --weight=1
+
+ynh_add_config --template="../conf/.env" --destination="$install_dir/.env"
+
+chmod 400 "$install_dir/.env"
+chown $app:$app "$install_dir/.env"
+
 #=================================================
 # Configure the release
 #=================================================