compose sample 2 added

Author: codershona

compose-sample-2/docker-compose.yml

@@ -0,0 +1,11 @@
+version: '3'
+
+services:
+  proxy:
+    image: nginx:1.13 # this will use the latest version of 1.13.x
+    ports:
+      - '80:80' # expose 80 on host and sent to 80 in container
+    volumes:
+      - ./nginx.conf:/etc/nginx/conf.d/default.conf:ro
+  web:
+    image: httpd  # this will use httpd:latest

compose-sample-2/nginx.conf

@@ -0,0 +1,15 @@
+server {
+
+	listen 80;
+
+	location / {
+
+		proxy_pass         http://web;
+		proxy_redirect     off;
+		proxy_set_header   Host $host;
+		proxy_set_header   X-Real-IP $remote_addr;
+		proxy_set_header   X-Forwarded-For $proxy_add_x_forwarded_for;
+		proxy_set_header   X-Forwarded-Host $server_name;
+
+	}
+}

docker-process-approach/docker-4.md

@@ -15,6 +15,16 @@ https://docs.docker.com
 ```
 
 ## Trying Out Basic Compose Commands
+* CLI tools comes with Docker for linux but seperate to download linux.
+* Not a production-grade tool but ideal for local development and test.
+* <b>Two common commands are: </b>
+     * docker-compose up : to setup volumes/networks and start all containers.
+     * docker-compose down : to stop all containers and remove cont/vol/net.
+* If all your projects had a Dockerfile and docker-compose.yml file then new devloper onboarding would be: 
+  * git clone github.com/some/software
+  * docker-compose up
+
+
 ```
 pcat docker-compose.yml