Add yarn.lock to gitignore

.gitignore

@@ -31,3 +31,5 @@ static/static_root/
 htmlcov
 .coverage
 .tox
+
+yarn.lock
\ No newline at end of file

[luxcem]

yarn.lock should’nt be ignored, sometimes yarn.lock get updated during yarn install. The solution is to only run yarn install --frozen-lockfile.

See https://github.com/yarnpkg/yarn/issues/4147