From fb7467862b094e14851c5180c3e6e2eae38fb5e8 Mon Sep 17 00:00:00 2001
From: Fulop <43729152+fulopkovacs@users.noreply.github.com>
Date: Thu, 3 Mar 2022 09:46:01 +0100
Subject: [PATCH] Update the playground README.md (#93)

---
 packages/playground/README.md | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/packages/playground/README.md b/packages/playground/README.md
index e9606aa..dbabb5e 100644
--- a/packages/playground/README.md
+++ b/packages/playground/README.md
@@ -25,7 +25,7 @@ src/
 
 Simply run `yarn run serve` in this folder to start the dev server.
 
-There are some shared playgrounds in `src/shared` which are committed to the repo. You can make your own playgrounds in `src/personal` which will be `.gitignore`d. Each 
+There are some shared playgrounds in `src/shared` which are committed to the repo. You can make your own playgrounds in `src/personal` which will be `.gitignore`d. Note that every playground must include an entry file called `index.tsx` (as you see in the [Directory structure section](#directory-structure)).
 
 ## How to write and run end-to-end tests
 
@@ -55,4 +55,4 @@ $ yarn playwright codegen http://localhost:8080/tests/[playground-name] # run th
 
 We're currently using [percy](https://percy.io) for visual regression testing. These tests run only the the [CI](../../.github/workflows/main.yml) using [Github actions](https://github.com/theatre-js/theatre/actions). Look at the example at [`src/tests/setting-static-props/test.e2e.ts`](src/tests/setting-static-props/test.e2e.ts) for an example of recording and diffing a screenshot.
 
-Please note that we haven't figured out the best practices for visual regression testing yet, so if the setup isn't optimal, please let us know.
\ No newline at end of file
+Please note that we haven't figured out the best practices for visual regression testing yet, so if the setup isn't optimal, please let us know.