Add ganache container

Add ganache container
Update 'README.md'

README.md

@@ -233,7 +233,7 @@ git clone https://github.com/sc0Vu/web3.php.git
 
 2. Copy web3.php to web3.php/docker/app directory and start container.
 ```
-cp files docker/app && docker-compose up -d php
+cp files docker/app && docker-compose up -d php ganache
 ```
 
 3. Enter php container and install packages.
@@ -241,7 +241,17 @@ cp files docker/app && docker-compose up -d php
 docker-compose exec php ash
 ```
 
-4. Run test script
+4. Change testHost in `TestCase.php`
+```
+/**
+ * testHost
+ * 
+ * @var string
+ */
+protected $testHost = 'http://ganache:8545';
+```
+
+5. Run test script
 ```
 vendor/bin/phpunit
 ```

docker/docker-compose.yml

@@ -9,3 +9,10 @@ services:
         volumes:
             - ./app:/app
         tty: true
+
+    ganache:
+        build:
+            context: ./ganache
+            dockerfile: Dockerfile
+        ports:
+            - "8545"

docker/ganache/Dockerfile

@@ -0,0 +1,9 @@
+FROM node:9.11.1-alpine
+
+MAINTAINER Peter Lai <alk03073135@gmail.com>
+
+RUN npm install -g ganache-cli
+
+EXPOSE 8545
+
+CMD ganache-cli --hostname=0.0.0.0