Update README.md

Author: jessiemongeon1

motoko/pub-sub/README.md

@@ -4,58 +4,20 @@ This sample project demonstrates how functions may be passed as arguments of int
 
 A common problem in both distributed and decentralized systems is keeping separate services (or canisters) synchronized with one another. While there are many potential solutions to this problem, a popular one is the publisher/subscriber pattern or "PubSub". PubSub is an especially valuable pattern on the Internet Computer as its primary drawback, message delivery failures, does not apply.
 
-## Prerequisites
-This example requires an installation of:
+## Deploying from ICP Ninja
 
-- [x] Install the [IC SDK](https://internetcomputer.org/docs/current/developer-docs/setup/install/index.mdx).
-- [x] Clone the example dapp project: `git clone https://github.com/dfinity/examples`
+[![](https://icp.ninja/assets/open.svg)](https://icp.ninja/editor?g=https://github.com/dfinity/examples/tree/master/motoko/pub-sub)
 
-Begin by opening a terminal window.
+## Build and deploy from the command-line
 
-## Step 1: Setup the project environment
+### 1. [Download and install the IC SDK.](https://internetcomputer.org/docs/building-apps/getting-started/install)
 
-Navigate into the folder containing the project's files and start a local instance of the Internet Computer with the commands:
+### 2. Download your project from ICP Ninja using the 'Download files' button on the upper left corner, or [clone the GitHub examples repository.](https://github.com/dfinity/examples/)
 
-```bash
-cd examples/motoko/pub-sub
-dfx start --background
-```
+### 3. Navigate into the project's directory.
 
-## Step 2: Deploy the canisters:
-
-```bash
-dfx deploy
-```
-
-## Step 3: Subscribe to the "Apples" topic
-
-```bash
-dfx canister call sub init '("Apples")'
-```
-
-## Step 4: Publish to the "Apples" topic
-
-```bash
-dfx canister call pub publish '(record { "topic" = "Apples"; "value" = 2 })'
-```
-
-## Step 5: Receive your subscription
-
-```bash
-dfx canister call sub getCount
-```
-
-The output should resemble the following:
-
-```bash
-(2 : nat)
-```
+### 4. Run `dfx start --background --clean && dfx deploy` to deploy the project to your local environment. 
 
 ## Security considerations and best practices
 
-If you base your application on this example, we recommend you familiarize yourself with and adhere to the [security best practices](https://internetcomputer.org/docs/current/references/security/) for developing on the Internet Computer. This example may not implement all the best practices.
-
-For example, the following aspects are particularly relevant for this app, since it makes inter-canister calls:
-* [Be aware that state may change during inter-canister calls.](https://internetcomputer.org/docs/current/developer-docs/security/security-best-practices/overview)
-* [Only make inter-canister calls to trustworthy canisters.](https://internetcomputer.org/docs/current/developer-docs/security/security-best-practices/overview)
-* [Don’t panic after await and don’t lock shared resources across await boundaries.](https://internetcomputer.org/docs/current/developer-docs/security/security-best-practices/overview)
+If you base your application on this example, it is recommended that you familiarize yourself with and adhere to the [security best practices](https://internetcomputer.org/docs/building-apps/security/overview) for developing on ICP. This example may not implement all the best practices.