Added example nginx proxy working

compose/docker-compose.yml

@@ -1,20 +1,3 @@
-web:
-  build: .
-  command: node index-db.js
-  ports:
-    - "3000:3000"
-  links:
-    - db
-  environment:
-    MYSQL_DATABASE: myapp
-    MYSQL_USER: myapp
-    MYSQL_PASSWORD: mysecurepass
-    MYSQL_HOST: db
-db:
-  image: orchardup/mysql
-  ports:
-    - "3306:3306"
-  environment:
-    MYSQL_DATABASE: myapp
-    MYSQL_USER: myapp
-    MYSQL_PASSWORD: mysecurepass
+services:
+  web:
+    image: nginx:latest

compose/proxy/nginx.conf

@@ -2,9 +2,9 @@ events {}
 http{
 
     upstream backend{
-        server web:80;
-        server web_2:80;
-        server web_3:80;
+        server proxy-web-1:80;
+        server proxy-web-2:80;
+        server proxy-web-3:80;
     }
 
     server{

compose/proxy/proxy.yml

@@ -1,8 +1,6 @@
 services:
   web: 
     image: nginx:alpine
-    volumes:
-      - ./web:/usr/share/nginx/html:ro
 
   proxy:
     image: nginx:alpine