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Add description for the Default MySQL, and shutdown the Default MySQL before running test.

.github/workflows/test.yml

@@ -18,6 +18,8 @@ jobs:
 
     steps:
     - uses: actions/checkout@v1
+    - name: Shutdown Ubuntu MySQL (SUDO)
+      run: sudo service mysql stop
     - name: Use Node.js ${{ matrix.node-version }}
       uses: actions/setup-node@v1
       with:

README.md

@@ -1,6 +1,10 @@
-# MySQL GitHub Action
+# MySQL GitHub Action [![Test status](https://github.com/mirromutth/mysql-action/workflows/test/badge.svg)](https://github.com/mirromutth/mysql-action/actions)
 
-This [GitHub Action](https://github.com/features/actions) sets up a MySQL database.
+This [GitHub Action](https://github.com/features/actions) sets up a MySQL database in Docker.
+
+It supports various MySQL options to accurately configure and execute MySQL. So it may not be your best choice when you just want to run a simple MySQL, see [The Default MySQL](#the-default-mysql).
+
+It is based on the Docker container and is limited by Github Actions, which contains only Linux now. Therefore it does not work in Mac OS and Windows environment.
 
 ## Usage
 
@@ -19,10 +23,46 @@ steps:
     mysql password: ${{ secrets.DatabasePassword }} # Required if "mysql user" exists. The password for the "mysql user"
 ```
 
-See [Docker Hub](https://hub.docker.com/_/mysql) for available versions.
+If want bind MySQL host port to 3306, please see [The Default MySQL](#the-default-mysql).
+
+See [Docker Hub](https://hub.docker.com/_/mysql) for available MySQL versions.
 
 See [Creating and using secrets (encrypted variables)](https://help.github.com/en/articles/virtual-environments-for-github-actions#creating-and-using-secrets-encrypted-variables) for hiding database password.
 
+## The Default MySQL
+
+MySQL *may* be installed and started by Github Actions (aka. the Default MySQL), that version is 5.7 generally, root superuser password is "root" and port is 3306. See [Software in virtual environments for GitHub Actions](https://help.github.com/en/articles/software-in-virtual-environments-for-github-actions).
+
+So before set-up a MySQL which host port is 3306 in Docker, please make sure the Default MySQL has been shutted-down. Otherwise, action will fail and print an error log that looks like: `Error starting userland proxy: listen tcp 0.0.0.0:3306: bind: address already in use.` (See [#2](https://github.com/mirromutth/mysql-action/issues/2))
+
+Sure, if you do not care about MySQL options, such as version, bound port, character set, character collation, root password, etc., you can use the Default MySQL instead of this Action.
+
+### Shutdown the Default MySQL
+
+```yaml
+jobs:
+  build:
+    runs-on: ubuntu-${{ ubuntu-version }} # is Ubuntu environment
+
+    # ... some other config ...
+
+    steps:
+    - # ... some prepare steps, like action/checkout, run some script without MySQL, etc.
+
+    - name: Shutdown Ubuntu MySQL (SUDO)
+      run: sudo service mysql stop # Shutdown the Default MySQL, "sudo" is necessary, please not remove it
+
+    - # ... some steps before set-up MySQL ...
+    - name: Set up MySQL
+      uses: mirromutth/[email protected]
+      with:
+        # ... Set-up MySQL configuration, see Usage
+
+    - # ... some steps after set-up MySQL ...
+
+    # ... some another config ...
+```
+
 ## License
 
 This project is released under the [MIT License](LICENSE).

entrypoint.sh

@@ -26,7 +26,7 @@ if [ -n "$INPUT_MYSQL_DATABASE" ]; then
   docker_run="$docker_run -e MYSQL_DATABASE=$INPUT_MYSQL_DATABASE"
 fi
 
-docker_run="$docker_run --restart always -d -p $INPUT_HOST_PORT:$INPUT_CONTAINER_PORT mysql:$INPUT_MYSQL_VERSION --port=$INPUT_CONTAINER_PORT"
+docker_run="$docker_run -d -p $INPUT_HOST_PORT:$INPUT_CONTAINER_PORT mysql:$INPUT_MYSQL_VERSION --port=$INPUT_CONTAINER_PORT"
 docker_run="$docker_run --character-set-server=$INPUT_CHARACTER_SET_SERVER --collation-server=$INPUT_COLLATION_SERVER"
 
 sh -c "$docker_run"

package.json

@@ -1,6 +1,6 @@
 {
   "name": "mysql-action",
-  "version": "1.1.1",
+  "version": "1.1.0",
   "description": "MySQL Github Action",
   "main": "build/app.js",
   "directories": {