Make it a little easier to run specific tests

Changes ./bin/test.sh to pass command line options to pytest, and default to
only running tests in the tests/ directory instead of everywhere excluding
a few directories which is more error-prone.

Also keeps the mock_server used in testing quiet so access log entries don't
appear on stdout.

pyproject.toml

@@ -107,6 +107,8 @@ lint = "./bin/lint.sh"
 test = "./bin/test.sh"
 # all = {composite = ["lint mypackage/", "test -v tests/"]}
 
+[tool.pytest.ini_options]
+testpaths = [ "tests" ]
 
 [project.scripts]
 archivebox = "archivebox.cli:main"