Merge pull request #817 from onflow/jp-audit-providers

Add auditors nav option

docs/ecosystem/auditors.md

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+---
+sidebar_position: 7
+description: |
+  Third-party auditors for Cadence contract auditing
+sidebar_custom_props:
+  icon: 🔎
+---
+
+# Auditors
+
+The following companies provide independent contract auditing services of Cadence smart contracts for the Flow ecosystem.
+
+<div id="cards" class="cards">
+
+## Nagra (Kudelski)
+
+[Nagra](https://www.nagra.com/) a multi-national provider of security services including blockchain security and smart contract auditing including Cadence.
+
+## NCC Group
+
+[NCC Group](https://www.nccgroup.com/us/) a global provider of security services including blockchain security and smart contract auditing including Cadence.
+
+## QuantStamp Inc,
+
+[Quantstamp Inc.](https://quantstamp.com/) specialising in blockchain security and smart contract auditing including Cadence.
+
+## Halborn Inc.
+
+[Halborn Inc.](https://www.halborn.com/) specialising in blockchain security and smart contract auditing including Cadence.
+
+## Oak Security 
+
+[Oak Security](https://www.oaksecurity.io/) a specialist in smart contract auditing security including Cadence.
+
+## Emerald City Academy 
+
+[Emerald City Academy - Shield](https://docs.ecdao.org/auditing/shield) a Cadence-specialized, community-driven auditing service also offering development support and review for Cadence smart contracts.
+
+</div>