From 3192d46768e54d33d956da1e132a82349e8a8abb Mon Sep 17 00:00:00 2001
From: Yu Chen <yuchen@mail.tsinghua.edu.cn>
Date: Mon, 2 Aug 2021 09:34:51 +0800
Subject: [PATCH] add .gitignore, update deploy.yml

---
 .github/workflows/deploy.yml | 2 +-
 .gitignore                   | 1 +
 2 files changed, 2 insertions(+), 1 deletion(-)
 create mode 100644 .gitignore

diff --git a/.github/workflows/deploy.yml b/.github/workflows/deploy.yml
index 8b4a56e..e2928c0 100644
--- a/.github/workflows/deploy.yml
+++ b/.github/workflows/deploy.yml
@@ -7,7 +7,7 @@ on:
 
 jobs:
   deploy:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-20.04
     steps:
       - uses: actions/checkout@v2
       - name: Setup mdBook
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..485dee6
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+.idea