[Fix] Set dynamic asset loading to work build-time

[benjamsf]

What does this PR do

Few fixes that weren't included in the previous feature PR:

• Set dynamic asset loading to take place buildtime (otherwise, during production builds, asset setting won't run).
• Fix privacypolicymodal not loading privacy policy from dynamic assets (forgot to set ns=dynamic)

Why

Didn't realize these until a production run of the integration repo was done

[benjamsf]

Alright, review ready.

• Set asset setting a build time job / tested this with a live production server
• Fixed navbar logo size to be dynamic (as of the tower and pvatk logo are of different aspect ratio)
• Just a few locale fixes: login will now be bit clearer like this:

Asking rambo for review, as of the significant change is about docker things.

[rambo]

LGTM now that it's a build-time arg too (needed for the production builds)