Update README.md

Author: jessiemongeon1

rust/inter-canister-calls/README.md

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-# `inter_canister_calls`
+# Inter-canister calls
 
 This project contains the code from the [inter-canister call Rust tutorial](https://internetcomputer.org/docs/building-apps/developer-tools/cdks/rust/intercanister). Please follow the tutorial for explanations.
+
+## Deploying from ICP Ninja
+
+[![](https://icp.ninja/assets/open.svg)](https://icp.ninja/editor?g=https://github.com/dfinity/examples/tree/master/rust/inter-canister-calls)
+
+## Build and deploy from the command-line
+
+### 1. [Download and install the IC SDK.](https://internetcomputer.org/docs/building-apps/getting-started/install)
+
+### 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/)
+
+### 3. Navigate into the project's directory.
+
+### 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, 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.