Patch 6 (#4)

* Code clean-up with the audio controller.
Remove the unitended declaration of global variables.

* Refactor audio_controller in  object  namespace style.
Backward compatibility is kept.

* Fixes HugoFara#138: changing audio speed was partially broken.

* Replaces calls to global audio functions by the new object.
Removes the undocumented audio functions.

* Avoid unnecessary function return type.

* Fixes "text_id is unkown" on text opening.

* Fixes warning on step 2 of feed wizard (related to HugoFara#129)

* Reorders functions to be in logical declaration order.

* Code cleaning.

* Refactoring jq_feedwizard as object namespace.

* Synctactic sugar on jq_feedwizard.js.

* Adds an helper object to avoid one-line JS.

* Prettyfies JS code.

* Isolates JS code in feed wizard step 3.

* Use json_encode to avoid PHP incursion in JS code.
Code prettyfying.

* Beautify JS and avoid calls to deprecated functions.

* Fixes JS errors on feeds: xPath was not set, and it was sometimes leave step 2.

* Beautifies demo DB as the users has the right to see what they install.

* Fix: the demo database was unreadable since last commit.
restore_file is much better at parsing SQL.

* Stop reading demo on errors, syntactic suger.

* Better detection of file end not read.

* Changes WoStatusChange to a value that doesn't need configuration change (HugoFara#78).

* Implementes HugoFara#148: removes dead feeds from demo database.

* Fixes a bug introduced in a previous commit.
Signalled by  @ProgramComputer.

* Fixes HugoFara#151: click delete on a language deletes the language.

* Multi-image docker

* Update docker-image.yml

* Update docker-image.yml

* Update docker-image.yml

* Update docker-image.yml

* Update docker-image.yml

* Update docker-image.yml

* Update docker-image.yml

* Update docker-image.yml

* Update docker-image.yml

* Update docker-image.yml

* future php platforms

* less vulnerabilities for larger size

* Lwt is accessed at /lwt/

https://hugofara.github.io/lwt/docs/info.html#install

* Update Dockerfile

---------

Co-authored-by: HugoFara <[email protected]>

Dockerfile

@@ -13,4 +13,4 @@ ARG DB_HOSTNAME=db
 ARG DB_USER=root
 ARG DB_PASSWORD=root
 ARG DB_DATABASE=learning-with-texts
-RUN printf '<?php\n$server = "%s";\n$userid = "%s";\n$passwd = "%s";\n$dbname = "%s";\n?>' "$DB_HOSTNAME" "$DB_USER" "$DB_PASSWORD" "$DB_DATABASE" > /var/www/html/connect.inc.php
+RUN printf '<?php\n$server = "%s";\n$userid = "%s";\n$passwd = "%s";\n$dbname = "%s";\n?>' "$DB_HOSTNAME" "$DB_USER" "$DB_PASSWORD" "$DB_DATABASE" > /var/www/html/lwt/connect.inc.php