add docker installation

docker.sh

@@ -0,0 +1,7 @@
+# chmod 755 docker.sh
+
+yarn --ignore-engines add
+yarn --ignore-engines build
+docker build -t "ping.pub/dashboard" .
+
+# then you can run "docker run -d -p 8080:80 ping.pub/dashboard"

installation.md

@@ -1,16 +1,26 @@
+# Prerequisite
+1. Node, https://nodejs.org 
+2. Yarn,  https://classic.yarnpkg.com/lang/en/docs/install/#mac-stable
+
 # Installation:
 
 1. Running with yarn
-```
-yarn && yarn serve
+```sh
+yarn --ignore-engines && yarn serve
 ```
 
 2. Building for web servers, like nginx, apache
-```
-yarn && yarn build
+```sh
+yarn --ignore-engines && yarn build
 cp -r ./dist/* <ROOT_OF_WEB_SERVER>
 ```
 
+3. Running with docker
+```sh
+./docker.sh
+docker run -d -p 8088:80 ping.pub/dashboard
+```
+
 # Enable LCD for Ping.pub (do this on the config for your chain)
 
 1. Set `enable = true` in `./config/app.toml`