Add compile option to Dockerfile to fix failing test (fixes #696) (#1223)

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.

Thanks, @bobwhitelock

Dockerfile

@@ -7,7 +7,7 @@ RUN apt update \
 
 
 RUN wget "https://www.sqlite.org/2020/sqlite-autoconf-3310100.tar.gz" && tar xzf sqlite-autoconf-3310100.tar.gz \
-    && cd sqlite-autoconf-3310100 && ./configure --disable-static --enable-fts5 --enable-json1 CFLAGS="-g -O2 -DSQLITE_ENABLE_FTS3=1 -DSQLITE_ENABLE_FTS4=1 -DSQLITE_ENABLE_RTREE=1 -DSQLITE_ENABLE_JSON1" \
+    && cd sqlite-autoconf-3310100 && ./configure --disable-static --enable-fts5 --enable-json1 CFLAGS="-g -O2 -DSQLITE_ENABLE_FTS3=1 -DSQLITE_ENABLE_FTS3_PARENTHESIS -DSQLITE_ENABLE_FTS4=1 -DSQLITE_ENABLE_RTREE=1 -DSQLITE_ENABLE_JSON1" \
     && make && make install
 
 RUN wget "http://www.gaia-gis.it/gaia-sins/freexl-sources/freexl-1.0.5.tar.gz" && tar zxf freexl-1.0.5.tar.gz \