Create archive page asynchronously

[bhilbert4]

Rather than querying the database and constructing the context for an instrument's archive page at the time of the request, do that work asynchronously, and save the results in a json file. Then when there is a request for the page, read in the json file and create the page.

[bhilbert4]

Github won't let me link it, but this should also resolve #959

[bhilbert4]

For this to work on the servers, we need to create the os.path.join(get_config('outputs'), "archive_page") directory.

[bhilbert4]

On the test server:
Time needed to load the nircam archive page using the develop branch: 1 minute and 45 seconds
Time needed when using this branch: 13 seconds.
🥳

[bhilbert4]

@mfixstsci I think this is ready for review.

[bhilbert4]

With these changes, the json files containing the content of the archive pages are updated after each run of archive_database_update.py, which is done via cron job.

[bhilbert4]

In addition to creating the new archive_page subdirectory under the outputs directory, we'll also need to run the new script on all of the instruments when we merge this.

from datetime import datetime
from jwql.website.apps.jwql.data_containers import create_archived_proposals_context
insts = ['nircam', 'miri', 'nirspec', 'niriss', 'fgs']
for inst in insts:
   print(f'Working on {inst}, {datetime.now()}')
   create_archived_proposals_context(inst)

[mfixstsci]

LGTM @bhilbert4 I am going to rebase the branch and then merge it once the CI is done.

[mfixstsci]

This is slick 👍