add bugfix learnings to readme and hacking (#2677)

HACKING.md

@@ -121,6 +121,8 @@ If you open a PR that isn't formatted according to `prettier`, CI will automatic
 
 We use `eslint` to check the frontend code. You can run it with `npm run lint`.
 
+Please note that you will need to have bash 5 or later installed to run the e2e tests. You can check your bash version by running `bash --version`.
+
 #### Canisters tests
 
 There are plenty of unit and integration tests that cover the different canisters of this repository which cover all the functionality that Internet Identity offer.

README.md

@@ -69,6 +69,10 @@ To access Internet Identity or configure it for your dapp, use one of the follow
 * Chrome, Firefox: `http://<canister_id>.localhost:4943`
 * Safari: `http://localhost:4943?canisterId=<canister_id>`
 
+#### Note on Apple Silicon
+
+If you are running into build issues on Apple Silicon (specifically, if rollup is trying to access @rollup/rollup-darwin-x64), try using nvm to install node.
+
 ### Architecture Overview
 
 Internet Identity is an authentication service for the [Internet Computer][ic]. All programs on the Internet Computer are Wasm modules, or canisters (canister smart contracts).