Update .gitignore - yarn cache dir

Yarn produce many files when running yarn install.
According to their doc[1], most of the files should be ignored, unless 
a zero-install strategy is wanted (which ois not the case here AFAIK).

[1] https://yarnpkg.com/getting-started/qa#which-files-should-be-gitignored

1 files changed, 11 insertions, 1 deletions

diff --git a/.gitignore b/.gitignore
index 7c5d5ec..f96d6f1 100644
--- a/.gitignore
+++ b/.gitignore
@@ -33,6 +33,16 @@ jspm_packages
 # Optional npm cache directory

 .npm

 

+# yarn cache directory

+.pnp.*

+.yarn/*

+!.yarn/patches

+!.yarn/plugins

+!.yarn/releases

+!.yarn/sdks

+!.yarn/versions

+

+

 # Optional REPL history

 .node_repl_history

 

@@ -44,4 +54,4 @@ jspm_packages
 

 /build_keycloak

 /build

-/storybook-static
\ No newline at end of file
+/storybook-static