fix bug when run using docker-compose

Docker/README.md

@@ -4,10 +4,11 @@ Simple and fast setup of EOS.IO on Docker is also available.
 
 ## Install Dependencies
  - [Docker](https://docs.docker.com) Docker 17.05 or higher is required
+ - [docker-compose](https://docs.docker.com/compose/) version >= 1.10.0
 
 ## Docker Requirement
  - At least 8GB RAM (Docker -> Preferences -> Advanced -> Memory -> 8GB or above)
- 
+
 ## Build eos image
 
 ```bash
@@ -43,10 +44,12 @@ curl http://127.0.0.1:8888/v1/chain/get_info
 ## Start both nodeos and walletd containers
 
 ```bash
-docker-compose up
+docker volume create --name=nodeos-data-volume
+docker volume create --name=walletd-data-volume
+docker-compose up -d
 ```
 
-After `docker-compose up`, two services named nodeos and walletd will be started. nodeos service would expose ports 8888 and 9876 to the host. walletd service does not expose any port to the host, it is only accessible to cleos when runing cleos is running inside the walletd container as described in "Execute cleos commands" section.
+After `docker-compose up -d`, two services named nodeos and walletd will be started. nodeos service would expose ports 8888 and 9876 to the host. walletd service does not expose any port to the host, it is only accessible to cleos when runing cleos is running inside the walletd container as described in "Execute cleos commands" section.
 
 
 ### Execute cleos commands
@@ -54,7 +57,7 @@ After `docker-compose up`, two services named nodeos and walletd will be started
 You can run the `cleos` commands via a bash alias.
 
 ```bash
-alias cleos='docker-compose exec walletd /opt/eosio/bin/cleos -H nodeos'
+alias cleos='docker-compose exec walletd /opt/eosio/bin/cleos -H nodeosd'
 cleos get info
 cleos get account inita
 ```

Docker/docker-compose.yml

-version: "4"
+version: "3"
 
 services:
   builder:
@@ -11,6 +11,7 @@ services:
       context: .
     image: eosio/eos
     command: /opt/eosio/bin/nodeosd.sh
+    hostname: nodeosd
     ports:
       - 8888:8888
       - 9876:9876
@@ -22,6 +23,7 @@ services:
   walletd:
     image: eosio/eos
     command: /opt/eosio/bin/keosd
+    hostname: walletd
     links:
       - nodeosd
     volumes:
@@ -29,4 +31,6 @@ services:
 
 volumes:
   nodeos-data-volume:
+    external: true
   walletd-data-volume:
+    external: true