Extract all search queries to API

[lukeromanowicz]

What is the motivation for adding / enhancing this feature?

1. will make the client lighter by removing unnecessary code possibly along with some dependencies
2. will make the environment more secure by restricting access to ElasticSearch
3. will simplify the vsf code it terms of maintenance and improve platform agnosticism

What are the acceptance criteria

• search queries are stored in ES instead of hardcoded/generated in vsf
• new search queries have simplified endpoints in API which allow querying specific information with short and simple http requests.
• all relevant configurations are moved from vsf to vsf-api

Can you complete this feature request by yourself?

• YES
• NO

Which Release Cycle state this refers to? Info for developer.

Pick one option.

• This is a normal feature request. This should be available on https://test.storefrontcloud.io and then after tests this can be added to next Vue Storefront version. In this case Developer should create branch from develop branch and create Pull Request 2. Feature / Improvement back to develop.
• (Pick this option only if you're sure) This is an important improvement request for current Release Candidate version on https://next.storefrontcloud.io and should be placed in next RC version. In this case Developer should create branch from release branch and create Pull Request 3. Stabilisation fix back to release.
• (Pick this option only if you're sure) This is a critical improvement request for current Stable version on https://demo.storefrontcloud.io and should be placed in next stable version. In this case Developer should create branch from hotfix or master branch and create Pull Request 4. Hotfix back to hotfix.

Additional information

It only makes sense to implement it as BC (instead of keeping both ways still available and make things even worse this way).

[pkarw]

Related to #2166 and #2167 -> more to this one

[cristian-g]

Hi! Which branch is being used for the development of this feature request?

[lukeromanowicz]

@cristian-g As the Release Cycle section says, it should be based on develop but it looks like nobody is currently working on this one.

[cristian-g]

Yes @lukeromanowicz but as @pkarw started something related to this some time ago (https://github.com/pkarw/vue-storefront/tree/feature/2166_simple_backend), are contributions expected to be forks from pkarw/vue-storefront or from DivanteLtd/vue-storefront? Maybe contributors can fork pkarw/vue-storefront, commit to 2166_simple_backend and the @pkarw could merge that to DivanteLtd/vue-storefront (just an idea!)