pull docker image first and run it in background

.appveyor.yml

@@ -51,7 +51,8 @@ services:
 
 before_test:
 #  Run openldap docker image
-  - ps: docker run --rm --name openldap --publish 1389:1389 --publish 1636:1636 -v ${pwd}\tests\Codeception\_data\certs:/certificates --env LDAP_ADMIN_USERNAME=admin --env LDAP_ADMIN_PASSWORD=adminpassword --env LDAP_USERS=customuser --env LDAP_PASSWORDS=custompassword --env LDAP_ENABLE_TLS=yes --env LDAP_TLS_CERT_FILE=/certificates/openldap.crt --env LDAP_TLS_KEY_FILE=/certificates/openldap.key --env LDAP_TLS_CA_FILE=/certificates/CA.crt --env BITNAMI_DEBUG=true --env LDAP_CONFIG_ADMIN_ENABLED=yes --env LDAP_CONFIG_ADMIN_USERNAME=admin --env LDAP_CONFIG_ADMIN_PASSWORD=configpassword bitnami/openldap:latest
+  - ps: docker pull bitnami/openldap:latest
+  - ps: docker run --rm --name openldap --publish 1389:1389 --publish 1636:1636 -v ${pwd}\tests\Codeception\_data\certs:/certificates --env LDAP_ADMIN_USERNAME=admin --env LDAP_ADMIN_PASSWORD=adminpassword --env LDAP_USERS=customuser --env LDAP_PASSWORDS=custompassword --env LDAP_ENABLE_TLS=yes --env LDAP_TLS_CERT_FILE=/certificates/openldap.crt --env LDAP_TLS_KEY_FILE=/certificates/openldap.key --env LDAP_TLS_CA_FILE=/certificates/CA.crt --env BITNAMI_DEBUG=true --env LDAP_CONFIG_ADMIN_ENABLED=yes --env LDAP_CONFIG_ADMIN_USERNAME=admin --env LDAP_CONFIG_ADMIN_PASSWORD=configpassword -d bitnami/openldap:latest
 #  Database setup for MySQL via PowerShell tools
   - >
     "C:\Program Files\MySQL\MySQL Server 5.7\bin\mysql" -u root -p"Password12!" -e "CREATE DATABASE IF NOT EXISTS test_joomla;"
@@ -60,3 +61,6 @@ test_script:
   - cd C:\projects\joomla-cms
   - libraries/vendor/bin/phpunit --testsuite Unit
   - libraries/vendor/bin/phpunit --testsuite Integration  --configuration tests/phpunit-appveyor.xml.dist
+
+after_test:
+  - ps: docker logs openldap