fix docker build

[Morantron]

The following error shows up when running docker build . when precompiling assets.

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 > [builder 18/21] RUN RAILS_ENV=production     SECRET_KEY_BASE=dummy     RAILS_MASTER_KEY=dummy     DB_ADAPTER=nulldb     bundle exec rails assets:precompile:
2.692 Error retrieving instance profile credentials: Failed to open TCP connection to 169.254.169.254:80 (execution expired)
2.700 bin/rails aborted!
2.700 Aws::Errors::MissingRegionError: No region was provided. Configure the `:region` option or export the region name to ENV['AWS_REGION'] (Aws::Errors::MissingRegionError)
2.700
2.700         raise Errors::MissingRegionError if region.nil? || region == ''
2.700               ^^^^^^^^^^^^^^^^^^^^^^^^^^
2.700 /app/app/models/user.rb:26:in `<class:User>'
2.700 /app/app/models/user.rb:1:in `<main>'
2.700 /app/config/routes.rb:11:in `block in <main>'
2.700 /app/config/routes.rb:4:in `<main>'
2.700 /app/config/environment.rb:5:in `<main>'
2.700 Tasks: TOP => environment
2.700 (See full trace by running task with --trace)
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This is fixed by adding STORAGE_PROVIDER=local, since ActiveStorage is not needed at that point. This seems to be a bug in ActiveStorage that is fixed in future Rails versions.

After this is fixed, the folowing error shows up:

 > [builder 18/21] RUN RAILS_ENV=production     SECRET_KEY_BASE=dummy     RAILS_MASTER_KEY=dummy     DB_ADAPTER=nulldb     STORAGE_PROVIDER=local     bundle exec rails assets:precompile:
5.471 bin/rails aborted!
5.471 Uglifier::Error:  (Uglifier::Error)
5.471
5.471 Tasks: TOP => assets:precompile
5.471 (See full trace by running task with --trace)
------

This is fixed by replacing uglifier with terser, which accepts modern JS syntax and seems more actively maintained.

[markets]

Thank you so much @Morantron 🙌