feat: update Vue Storefront core packages to 2.5.7

[fpdrozd]

This PR is the first step of incrementally upgrading Vue Storefront to the latest version (2.7.3 at the time).

Description

According to the 2.5.7 Changelog this is the first version that introduces some breaking changes since the current 2.5.0.

The middlewareUrl is applied now and it is being generated from the BASE_URL environment variable and it defaults to localhost:3000 if not specified. This property is required since 2.5.7.

Parts of the app had to be refactored. The cacheControl theme helper is not available anymore.

Related Issue

Motivation and Context

How Has This Been Tested?

Tested by performing a checkout pass.

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

[rafalcymerys]

Where is this used? It looks a bit tricky, we should at least use an env variable here + do some reasonable fallback

[fpdrozd]

It's one of the breaking changes - see here. Basically storefront expects this url now in the nuxt config instead of computing it on its own. We already use env variables for the middleware server config in the same file so we can do the same here:

server: {
  port: process.env.PORT || 3000,
  host: process.env.HOST || '0.0.0.0'
}

But first I want to make it work :)

[fpdrozd]

FYI, I resolved the error by bringing back the @vue-storefront/middleware/nuxt to the nuxt.config.js.

You need to remove the Server Middleware module from the nuxt.config.js and configure the domain your middleware is using.

// nuxt.config.js
export default {
  modules: [
-    '@vue-storefront/middleware/nuxt'
  ],
+  publicRuntimeConfig: {
+    middlewareUrl: 'http://localhost:3000/api/'
+  }
}

Out of context it looked like an upgrade instruction attached to the PR with that change.