add README

Author: garymengcom

README.md

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+# dlnmp
+Completely LNMP environment for ONE KEY deploy.
+
+### Feature
+1. Multiple domains support.
+2. HTTPS and HTTP/2 support.
+3. PHP source located in host.
+4. MySQL data directory in host.
+5. All conf files located in host.
+6. All log files located in host.
+
+### Usage
+1. Install `git`, `docker` and `docker-compose`;
+2. Clone all dlnmp directories and files from Github:
+    ```
+    $ git clone https://github.com/yeszao/dlnmp.git
+    ```
+4. Start docker container:
+    ```
+    $ docker-compose up
+    ```
+    You may need use `sudo` before this command.
+5. Go to your browser and type `localhost`, you will see:
+    ![Demo Image](https://github.com/yeszao/dlnmp/raw/master/snapshot.png)
+    Change `index.php` in `./www/site1/` for more testing.