Run initial migrate command in background.

[dchiller]

Running the migrate command results in a complete reindexing of the
Solr backend. Running in background allows access to website while
indexing is completed.

[napulen]

The initial solr reindexing should only have the basic model templates, right?

I don't see harm in this change, but I am curious on the time elapsed on this makemigrations. It shouldn't be much different from the one running on the background, is it?

[dchiller]

You are correct, unless you are rebooting the docker container, but keeping the same database....in other words, what if we make a change to a view, but don't want to have to reimport everything or remap everything if the db is fine.

In that case, everything in the db is reindexed.

[napulen]

Merging