[openstreetmap/openstreetmap-website] Add microcosms to the website (#2390)

[Brian DeRocher]

@openbrian pushed 1 commit.

5ce28365b19c250cd4a569e98e55557737d8e77d  Resolve this "Setting NOT NULL on a column requires an AccessExclusiveLock, which is expensive on large tables.  Instead use a contraint and validate it in a separate migration with a more agreeable RowShareLock."


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View it on GitHub:
https://github.com/openstreetmap/openstreetmap-website/pull/2390/files/5aee2c2ec31f02eb1ffede84dc867c97bba64ee2..5ce28365b19c250cd4a569e98e55557737d8e77d
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