create an image for nginx and add Docker instructions

Author: julianduque

README.md

@@ -29,3 +29,26 @@ $ curl -F "file=@./image.jpg" http://localhost:3000/
 ```
 $ curl -X POST -d "{\"image\": \"xxxxxx-xxxx-xxxx-xxxx-xxxxxx.jpg\", \"filter\": \"sepia\"}" http://localhost:3000/
 ```
+
+## Docker
+
+### Build Images
+
+```
+$ docker build upload -t micro-upload
+$ docker build preview -t micro-preview
+$ docker build save -t micro-save
+$ docker build nginx -t micro-nginx
+```
+
+or run
+
+```
+$ ./build-images.sh
+```
+
+## Run with `docker-compose`
+
+```
+$ docker-compose up -d
+```

build-images.sh

@@ -0,0 +1,6 @@
+#!/bin/bash
+
+docker build upload -t micro-upload
+docker build preview -t micro-preview
+docker build save -t micro-save
+docker build nginx -t micro-nginx

docker-compose.yml

@@ -1,29 +1,25 @@
 version: "2"
 services:
   web:
-    image: nginx
+    image: micro-nginx
     links:
       - upload
       - preview
       - save
     ports:
       - "8000:80"
-    volumes:
-      - ./microservices.conf:/etc/nginx/conf.d/microservices.conf
-    command: [nginx, '-g', 'daemon off;']
-
   upload:
-    build: ./upload
+    image: micro-upload
     environment:
       - AWS_ACCESS_KEY=${AWS_ACCESS_KEY}
       - AWS_SECRET_KEY=${AWS_SECRET_KEY}
   preview:
-    build: ./preview
+    image: micro-preview
     environment:
       - AWS_ACCESS_KEY=${AWS_ACCESS_KEY}
       - AWS_SECRET_KEY=${AWS_SECRET_KEY}
   save:
-    build: ./save
+    image: micro-save
     environment:
       - AWS_ACCESS_KEY=${AWS_ACCESS_KEY}
       - AWS_SECRET_KEY=${AWS_SECRET_KEY}

nginx/Dockerfile

@@ -0,0 +1,7 @@
+FROM nginx:latest
+
+COPY microservices.conf /etc/nginx/conf.d/microservices.conf
+
+EXPOSE 80
+
+CMD [ "nginx", "-g", "daemon off;" ]