[enh] container: nitpicks (#6862)

Reduce Valkey writes to database
Should error with 1, not 127

container/.env.example

@@ -1,7 +1,7 @@
 # Read the documentation before using the `docker-compose.yml` file:
 # https://docs.searxng.org/admin/installation-docker.html
 #
-# Additional ENVs:
+# Additional variables:
 # https://docs.searxng.org/admin/settings/settings_general.html#settings-general
 # https://docs.searxng.org/admin/settings/settings_server.html#settings-server
 

container/docker-compose.yml

@@ -18,7 +18,7 @@ services:
   valkey:
     container_name: searxng-valkey
     image: docker.io/valkey/valkey:9-alpine
-    command: valkey-server --save 30 1 --loglevel warning
+    command: valkey-server --save 300 1 --save 60 1000 --loglevel warning
     restart: always
     volumes:
       - valkey-data:/data/

container/entrypoint.sh

@@ -13,7 +13,7 @@ check_file() {
 !!! "$target" is not a valid file, exiting...
 !!!
 EOF
-        exit 127
+        exit 1
     fi
 }
 
@@ -28,7 +28,7 @@ check_directory() {
 !!! "$target" is not a valid directory, exiting...
 !!!
 EOF
-        exit 127
+        exit 1
     fi
 }