Add compile option to Dockerfile to fix failing test (fixes #696)

[bobwhitelock]

This test was failing when run inside the Docker container: test_searchable[/fixtures/searchable.json?_search=te*+AND+do*&_searchmode=raw-expected_rows3],

with this error:

    def test_searchable(app_client, path, expected_rows):
        response = app_client.get(path)
>       assert expected_rows == response.json["rows"]
E       AssertionError: assert [[1, 'barry c...sel', 'puma']] == []
E         Left contains 2 more items, first extra item: [1, 'barry cat', 'terry dog', 'panther']
E         Full diff:
E         + []
E         - [[1, 'barry cat', 'terry dog', 'panther'],
E         -  [2, 'terry dog', 'sara weasel', 'puma']]

The issue was that the version of sqlite3 built inside the Docker container was built with FTS3 and FTS4 enabled, but without the
SQLITE_ENABLE_FTS3_PARENTHESIS compile option passed, which adds support for using AND and NOT within match expressions (see https://sqlite.org/fts3.html#compiling_and_enabling_fts3_and_fts4 and https://www.sqlite.org/compile.html).

Without this, the AND used in the search in this test was being interpreted as a literal string, and so no matches were found. Adding this compile option fixes this.

---

I actually ran into this issue because the same test was failing when I ran the test suite on my own machine, outside of Docker, and so I eventually tracked this down to my system sqlite3 also being compiled without this option.

I wonder if this is a sign of a slightly deeper issue, that Datasette can silently behave differently based on the version and compilation of sqlite3 it is being used with. On my own system I fixed the test suite by running pip install pysqlite3-binary, so that this would be picked up instead of the sqlite package, as this seems to be compiled using this option, . Maybe using pysqlite3-binary could be installed/recommended by default so a more deterministic version of sqlite is used? Or there could be some feature detection done on the available sqlite version, to know what features are available and can be used/tested?

[codecov]

Codecov Report

Merging #1223 (d1cd1f2) into main (9603d89) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main    #1223   +/-   ##
=======================================
  Coverage   91.42%   91.42%           
=======================================
  Files          32       32           
  Lines        3955     3955           
=======================================
  Hits         3616     3616           
  Misses        339      339           

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[simonw]

This is fantastic, thanks so much for tracking this down.