Test env variables in github action

.github/workflows/go.yml

@@ -30,7 +30,13 @@ jobs:
       run: |
         go build -v . 
       working-directory: ./server
-
+    - name: Modify config params
+      run: |
+        sed -i 's/%{address}/$MYSQL_ADDR/' config.yaml
+        sed -i 's/%{username}/$MYSQL_USERNAME/' config.yaml
+        sed -i 's/%{password}/$MSQL_PASSWORD/' config.yaml
+        cat config.yaml
+      working-directory: ./server
     - name: Run 
       run: | 
         nohup ./gin-vue-admin &