Setup gitcoin.co domains for MACI

[codenamejason]

Update DNS to add the MACI domains

• [x] Builder
• [x] Manager
• [x] Explorer

https://manager-maci.gitcoin.co/ https://builder-maci.gitcoin.co/ https://explorer-maci.gitcoin.co/

[0xKurt]

How should the domain look like?

• [ ] explorer.maci.gitcoin.co

• [x] explorer-maci.gitcoin.co

• [ ] maci-explorer.gitcoin.co

• [ ] maci.explorer.gitcoin.co

• [ ] explorer.zuzalu.gitcoin.co

• [ ] explorer-zuzalu.gitcoin.co

• [ ] zuzalu-explorer.gitcoin.co

• [ ] zuzalu.explorer.gitcoin.co

• [ ] other