README updates

[nicolewhite]

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Name	Status	Preview	Comments	Updated (UTC)
autoblocks-examples	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Oct 24, 2023 1:18pm

[review-agent-prime]

The changes in the PR look good overall. However, there are a couple of minor improvements that could be made:

1. In the "Getting started" section, the .env file creation instructions could be made clearer. Instead of having the filename .env on a new line, it would be more readable to include it in the sentence.

- Create a `.env` file at the root of this repository with the following environment variables
+ Create a file named `.env` at the root of this repository and include the following environment variables

2. In the "JavaScript" section, the note about the requirements could be made more readable by removing the backticks around node >= 16.

- All JavaScript examples require `npm` and `node >= 16` to be installed.
+ All JavaScript examples require `npm` and node version 16 or higher to be installed.

These changes should make the instructions more clear and easier to follow.