Set smoketest Alpine Linux version to 3.21 and fix deprecated chown syntax

Author: TrafeX

docker-compose.test.yml

@@ -21,7 +21,7 @@ services:
       FS_METHOD: direct
 
   sut:
-    image: alpine:3
+    image: alpine:3.21
     depends_on:
       - wordpress
     command: /tmp/run_tests.sh

entrypoint.sh

@@ -8,7 +8,7 @@ if [ ! "$(ls -A "/var/www/wp-content" 2>/dev/null)" ]; then
     echo 'Setting up wp-content volume'
     # Copy wp-content from Wordpress src to volume
     cp -r /usr/src/wordpress/wp-content /var/www/
-    chown -R nobody.nobody /var/www
+    chown -R nobody:nobody /var/www
 fi
 # Check if wp-secrets.php exists
 if ! [ -f "/var/www/wp-content/wp-secrets.php" ]; then

run_tests.sh

@@ -1,4 +1,4 @@
 #!/usr/bin/env sh
 apk --no-cache add curl
-while ! curl -fs wordpress > /dev/null; do echo -n '.'; sleep 1; done;
-curl --silent --fail http://wordpress/wp-admin/install.php | grep 'wp-core-ui' > /dev/null
+for i in $(seq 1 10); do curl -fs wordpress > /dev/null && break || { echo -n '.'; sleep 1; }; done;
+curl --silent --fail http://wordpress/wp-admin/install.php | grep 'wp-core-ui'