Merge branch 'update-appmonitor' into 'master'

docker/.env

docker/containers/web-server/Dockerfile

...containers/web-server/apache/sites-enabled/vhost_app.conf

docker/containers/web-server/php/extra-php-config.ini

docker/docker-compose.yml

docker/init.sh

docker/init.sh.cfg

hooks/templates/inc_config.php.erb

public_html/appmonitor/check-appmonitor-server.php

public_html/appmonitor/classes/appmonitor-checks.class.php

public_html/appmonitor/classes/appmonitor-client.class.php

public_html/appmonitor/classes/client_all_in_one.php

public_html/appmonitor/general_include.php

public_html/appmonitor/git_update_appmonitor.sh

public_html/appmonitor/index.php

public_html/appmonitor/local.php

public_html/appmonitor/plugins/apps/concrete5.php

public_html/appmonitor/plugins/apps/dokuwiki.php

...ic_html/appmonitor/plugins/apps/iml-appmonitor-server.php

public_html/appmonitor/plugins/apps/inc_appcheck_end.php