small readme update

333d4cfc · ben-chain · 6d05dd21 · 333d4cfc
Commit 333d4cfc authored Oct 04, 2020 by ben-chain
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README.md packages/contracts/README.md +5 -1

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 # Optimism's Contracts (V2)

-This package contains the various Ethereum smart contracts that make up the Layer 1 component of Optimism's Optimistic Rollup construction. 
+This package contains the various Ethereum smart contracts that make up the Layer 1 component of Optimism's Optimistic Rollup construction.
+
+## Building and Running
+
+This package requires that `yarn` be installed on your machine!  Once it is, run `yarn test` to build and run tests.

 ## Disclaimer