updated setup.md

Signed-off-by: Gaurav Gahlot <gaurav.gahlot19@gmail.com>

docs/setup.md

@@ -1,32 +1,9 @@
 # Setup the Provisioner machine with docker-compose.yml file
 
-1. ### Setup git
-    ```shell
-   Ubuntu -  $ apt install -y git
-   CentOS -  $ yum install -y git
-    ```
+Execute the following commands to bring up the Tinkerbell stack and setup the provisioner:
+```shell
+$ wget https://raw.githubusercontent.com/infracloudio/tink/deploy_stack/setup.sh && chmod +x setup.sh
+$ ./setup.sh
+```
 
-2. ### Install docker and docker-compose as follows:
-   ```shell
-    $ curl -L get.docker.com | bash
-    $ curl -L "https://github.com/docker/compose/releases/download/1.24.1/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose
-    $ chmod +x /usr/local/bin/docker-compose
-    For CentOS only:
-        $ systemctl start docker 
-        $ echo "net.ipv4.ip_forward=1" >> /etc/sysctl.conf 
-        $ systemctl restart network
-   ```
-
-3. ### Clone the tink repo in the $GOPATH
-    ```shell
-    $ git clone https://github.com/tinkerbell/tink.git
-    $ cd tink/deploy
-    ```
-
-4. ### Provide the input details in "inputenv" file which also includes the name of network interface which you would like to configure.
-
-5. ### Run the following command as "root" user
-    ```shell
-    $ source inputenv
-    $ ./setup_with_docker_compose.sh
-    ```
+All the environment variables are kept in the `envrc` file, which is generated from the setup itself. It is advised that you keep all the environment variables in the same file. It is important to note that if you execute the setup the again, a new `envrc` will be generated. However, the current environment configuration be saved as `envrc.bak`.