Test for env variables

.github/workflows/go.yml

@@ -32,6 +32,7 @@ jobs:
       working-directory: ./server
     - name: Modify config params
       run: |
+        echo $LANG
         sed -i 's/%{address}/$MYSQL_ADDR/' config.yaml
         sed -i 's/%{username}/$MYSQL_USERNAME/' config.yaml
         sed -i 's/%{password}/$MSQL_PASSWORD/' config.yaml