Module development and code questions

I have a Drupal 8.7 site with the Drupal Commerce 2.14 module.

I created a marketplace (several merchants on the same site). In the store type, I created a "Text (formatted, long)" field with the machine name field_terms_and_conditions.

In this field, the merchant writes his general conditions of sale, which the customer will have to accept during the order process.

Hi,

I am developing a e-commerce web site with drupal commerce, everything is okey but I have a problem,

I want to add price(add to cart) product attributes. 

Exp: Coffee: 2$

      add milk: +1 $

     add honey: +2 $

cart: 5$

thanks.

I am using group module and indexing the "group content" entity. Elastic search is indexing only the newly created content but not the updated content. Can anyone please help me with this issue?

Modules used:

1) Group, Group Node 

2) Elastic Search Connector (8.x-5.0-alpha3)

3) Search Api

Search results are displayed under {group_name}/search and rendered using view.

I have a site with Drupal 8.7 and Drupal Commerce 2.14

I created a template for my stores :

commerce-store--professionnel--full.html.twig

And I added this code :

<div class="col-xs-12 col-sm-12 col-md-12 col-lg-12 bs-region-legal">
{{ store.field_professionnel_cgv }}
</div>

It works.

Now I have created a template for my products :

commerce-product--produit--full.html.twig

Hi,

I have a table in the database that looks like this:

https://imgur.com/a/VNvZSQl

I want to loop over different langcode values. So far, I have coded as follows:

$source_language = db_query("SELECT langcode FROM table_name WHERE bundle = :textname", [':textname' => 'gita'])->fetchAll();
 foreach($source_language as $lang) {

// do stuffs

}

I want to remove Vary: Cookie,Accept-Encoding (from HTTP header response) from homepage, for anonymous user in drupal 7.

header_remove("Vary");  in template_preprocess() is not working for me. I also commented from .htaccess file.

I have Authcache module also installed, but dont know from where I can disable it.

Can anyone please help me on this!

Thanks a lot!