Add MySQL service to Github actions

.github/workflows/rust.yml

@@ -15,6 +15,19 @@ jobs:
   test:
     name: Unit Test
     runs-on: ubuntu-20.04
+    services:
+      mysql:
+        image: mysql:5.7
+        env:
+          MYSQL_HOST: 127.0.0.1
+          MYSQL_DB: mysql
+          MYSQL_USER: sea
+          MYSQL_PASSWORD: sea
+          MYSQL_ALLOW_EMPTY_PASSWORD: yes
+          MYSQL_ROOT_PASSWORD:
+        ports:
+          - "3306:3306"
+        options: --health-cmd="mysqladmin ping" --health-interval=10s --health-timeout=15s --health-retries=10
     steps:
       - uses: actions/checkout@v2