Improved docker files

Dockerfile

@@ -1,12 +1,28 @@
 FROM golang:1.10
 
-RUN apt-get update && apt-get install -y wget
-RUN wget https://github.com/jwilder/dockerize/releases/download/v0.2.0/dockerize-linux-amd64-v0.2.0.tar.gz
-RUN tar -C /usr/local/bin -xzvf dockerize-linux-amd64-v0.2.0.tar.gz
+ARG PLATFORM=linux
+ENV PLATFORM $PLATFORM_VERSION
+
+ARG ARCH=amd64
+ENV ARCH $ARCH_VERSION
+
+ARG DOCKERIZE_VERSION=v0.2.0
+ENV DOCKERIZE_VERSION $DOCKERIZE_VERSION
+
+ADD https://github.com/jwilder/dockerize/releases/download/$DOCKERIZE_VERSION/dockerize-$PLATFORM-$ARCH-$DOCKERIZE_VERSION.tar.gz /usr/local/bin
+
+RUN cd /usr/local/bin \
+    && tar -xzf ./dockerize-$PLATFORM-$ARCH-$DOCKERIZE_VERSION.tar.gz \
+    && rm -f ./dockerize-$PLATFORM-$ARCH-$DOCKERIZE_VERSION.tar.gz
 
 RUN mkdir -p /go/src/github.com/eventials/goevents
 WORKDIR /go/src/github.com/eventials/goevents
 
-RUN go get github.com/streadway/amqp
-RUN go get github.com/sirupsen/logrus
-RUN go get github.com/stretchr/testify
+RUN go get \
+    github.com/streadway/amqp \
+    github.com/sirupsen/logrus \
+    github.com/stretchr/testify
+
+ENTRYPOINT ["dockerize"]
+
+CMD ["-wait", "tcp://broker:5672", "-timeout", "60s", "go", "run", "examples/consumer/consumer.go"]

docker-compose.yml

@@ -2,12 +2,13 @@ version: '2'
 services:
   app:
     build: .
-    working_dir: /go/src/github.com/eventials/goevents
-    command: dockerize -wait tcp://broker:5672 -timeout 60s go run examples/consumer/consumer.go
     links:
      - broker
+    depends_on:
+     - broker
     volumes:
      - .:/go/src/github.com/eventials/goevents
+
   broker:
     image: rabbitmq:3.6-management
     ports: