Add disclaimer (#67)

Author: Michael de Hoog

DISCLAIMER.md

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+We’re excited for you to build on Base 🔵 — but we want to make sure that you understand the nature of the the node software and smart contracts offered here.
+
+THE NODE SOFTWARE AND SMART CONTRACTS CONTAINED HEREIN ARE FURNISHED AS IS, WHERE IS, WITH ALL FAULTS AND WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING ANY WARRANTY OF MERCHANTABILITY, NON- INFRINGEMENT, OR FITNESS FOR ANY PARTICULAR PURPOSE. IN PARTICULAR, THERE IS NO REPRESENTATION OR WARRANTY THAT THE NODE SOFTWARE AND SMART CONTRACTS WILL PROTECT YOUR ASSETS —  OR THE ASSETS OF THE USERS OF YOUR APPLICATION — FROM THEFT, HACKING, CYBER ATTACK, OR OTHER FORM OF LOSS OR DEVALUATION.
+
+You also understand that using the node software and smart contracts are subject to applicable law, including without limitation, any applicable anti-money laundering laws, anti-terrorism laws, export control laws, end user restrictions, privacy laws, or economic sanctions laws/regulations.