Merge pull request #997 from dfinity/jessiemongeon1-patch-1

add: explicit statement about running basic_bitcoin on mainnet

Author: jessiemongeon1

motoko/basic_bitcoin/README.md

@@ -20,6 +20,10 @@ For a deeper understanding of the ICP < > BTC integration, see the [Bitcoin inte
 
 * [x] Install the [IC SDK](https://internetcomputer.org/docs/current/developer-docs/setup/install/index.mdx).
 
+:::info 
+This example is designed to be deployed on the mainnet. It will return errors when deployed locally; these errors are expected.
+:::
+
 ## Step 1: Building and deploying sample code
 
 ### Clone the smart contract
@@ -174,4 +178,4 @@ If you base your application on this example, we recommend you familiarize yours
 
 For example, the following aspects are particularly relevant for this app:
 * [Certify query responses if they are relevant for security](https://internetcomputer.org/docs/current/references/security/general-security-best-practices#certify-query-responses-if-they-are-relevant-for-security), since the app e.g. offers a method to read balances.
-* [Use a decentralized governance system like SNS to make a canister have a decentralized controller](https://internetcomputer.org/docs/current/developer-docs/security/security-best-practices/overview)
+* [Use a decentralized governance system like SNS to make a canister have a decentralized controller](https://internetcomputer.org/docs/current/developer-docs/security/security-best-practices/overview)