Add support for customizable session storage in Magento environment

.env.sample

@@ -45,4 +45,9 @@ COMPOSER_AUTH='{"http-basic":{"repo.magento.com":{"username":"<public-key>","pas
 # Outside /bitnami/magento/
 COMPOSER_CACHE_DIR=/opt/.composer/cache
 
-BITNAMI_DEBUG=false
+BITNAMI_DEBUG=false
+
+# Customize env.php file.
+MAGENTO_ENV_SESSION="['save' => 'files']"
+# Example: use Redis as session storage
+# MAGENTO_ENV_SESSION="[ 'save' => 'redis', 'redis' => [ 'host' => 'redis', 'port' => '6379', 'password' => '', 'timeout' => '4', 'persistent_identifier' => '', 'database' => '2', 'compression_threshold' => '2048', 'compression_library' => 'gzip', 'log_level' => '3', 'max_concurrency' => '25', 'break_after_frontend' => '5', 'break_after_adminhtml' => '30', 'first_lifetime' => '600', 'bot_first_lifetime' => '60', 'bot_lifetime' => '7200', 'disable_locking' => '1', 'min_lifetime' => '60', 'max_lifetime' => '7776000' ] ]"

docker-entrypoint-init.d/03-custom_env_values.sh

@@ -0,0 +1,16 @@
+#!/bin/bash
+
+# check if MAGENTO_ENV_SESSION is set and it is different from the default value
+if [ -z "$MAGENTO_ENV_SESSION" ] || [ "$MAGENTO_ENV_SESSION" = "['save' => 'files']" ]; then
+    echo "MAGENTO_ENV_SESSION is not set or is set use the default value, skipping..."
+    exit 0
+fi
+
+cd /bitnami/magento/app/etc || exit 0
+
+file="env.php"
+sed -i.bak "/'session' => \[/,/\],/c\
+    'session' => $MAGENTO_ENV_SESSION \
+    ," "$file"
+
+echo "Updated /bitnami/magento/app/etc/$file with MAGENTO_ENV_SESSION. Backup saved as /bitnami/magento/app/etc/$file.bak"