Updating compose files to v3

Author: ManoMarks

12factor/05_build_release_run.md

@@ -50,7 +50,7 @@ There are several options to inject the configuration in the build, among them
 We'll go for the second option and define a docker-compose file where the MONGO_URL will be set with the value of the execution environment
 
 ```
-version: '2'
+version: '3'
 services:
   mongo:
     image: mongo:3.2

12factor/06_processes.md

@@ -32,7 +32,7 @@ Once done, the app needs to be rebuilt `docker build -t message-app:v0.2 .`
 **REDIS_HOST** needs to be added to the docker-compose file as the new release will run against this kv store.
 
 ```
-version: '2'
+version: '3'
 services:
   mongo:
     image: mongo:3.2

12factor/07_port_binding.md

@@ -11,7 +11,7 @@ The host has the responsibility to route the request to the correct application
 Docker already handles that for us, as we can see in the docker-compose file. The **app** container exposes port 80 internally and the host maps it against its port 8000.
 
 ```
-version: '2'
+version: '3'
 services:
   mongo:
     image: mongo:3.2

developer-tools/nodejs-debugging/VSCode-README.md

@@ -43,7 +43,7 @@ As you can see it installs [nodemon](http://nodemon.io/), a utility that will mo
 You'll start the app with the `docker-compose.yml`
 
 ```
-version: "2"
+version: "3"
 
 services:
   web:

developer-tools/nodejs/porting/4_single_host_networking.md

@@ -143,7 +143,7 @@ The application container (named **app**) is connected to mongo container using
 The following file (docker-compose.yml) defines the whole application
 
 ```
-version: '2'
+version: '3'
 services:
   mongo:
     image: mongo:3.2
@@ -202,7 +202,7 @@ It will update it's configuration each time a container is started / stopped.
 The new version of our docker-compose.yml is
 
 ```
-version: '2'
+version: '3'
 services:
   mongo:
     image: mongo:3.2

developer-tools/nodejs/porting/6_deploy_on_swarm.md

@@ -120,7 +120,7 @@ The image can now be used in our Docker Compose file.
 The new version of the docker-compose.yml file is the following one
 
 ```
-version: '2'
+version: '3'
 services:
   mongo:
     image: mongo:3.2

windows/windows-containers/MultiContainerApp.md

@@ -36,7 +36,7 @@ If using Windows Server 2016 and accessing from outside the VM or host, simply u
 Take a closer look at the `docker-compose.windows.yml` file.
 
 ```
-version: '2'
+version: '3'
 services:
   db:
     image: microsoft/mssql-server-2016-express-windows