Add docs related to CLAs and Slack channels (#158)

# Summary
Add docs related to CLAs and Slack channels. This is based on feedback
from first time contributors.

Signed-off-by: James Spadafora <spadjv@gmail.com>

Author: jspada200

CONTRIBUTING.md

@@ -13,14 +13,23 @@ ASWF projects. The DNA TSC, when fully formed, can revise this all as needed.
 Communications
 --------------
 
-* [ASWF Slack](https://slack.aswf.io) -- join for the `#wg-ml` channel for the discussions about this project.
+* [ASWF Slack](https://slack.aswf.io) -- join for the `#wg-ml` channel for the discussions about machine learning and the `#dna` and `##dailies-notes-assistant-tech` channels for the discussions about Dailies Notes Assistant.
 * Weekly Technical Steering Committee (TSC) Zoom meetings are currently Mondays at 12:00 PT (requests to change the day or time will be entertained if it's impeding participation of stakeholders).
 
 
 Contributor License Agreement (CLA) and Intellectual Property
 -------------------------------------------------------------
 
-We don't yet have a CLA in place. TBD.
+### Contributor License Agreements
+To contribute to DNA, you must sign a Contributor License Agreement through the EasyCLA system, which is integrated with GitHub as a pull request check.
+
+Prior to submitting a pull request, you can sign the form through this link. If you submit a pull request before the form is signed, the EasyCLA check will fail with a red NOT COVERED message, and you'll have another opportunity to sign the form through the provided link.
+
+If you are an individual writing the code on your own time and you're sure you are the sole owner of any intellectual property you contribute, you can sign the CLA as an Individual Contributor.
+
+If you are writing the code as part of your job, or if your employer retains ownership to intellectual property you create, then your company's legal affairs representatives should sign a Corporate Contributor License Agreement. If your company already has a signed CCLA on file, ask your local CLA manager to add you to your company's approved list.
+
+The DNA CLAs are the standard forms used by Linux Foundation projects and recommended by the ASWF TAC.
 
 ### DCO contribution sign off
 

README.md

@@ -121,7 +121,7 @@ DNA is built for:
   - Submit a Pull Request: [**https://github.com/AcademySoftwareFoundation/dna/pulls**](https://github.com/AcademySoftwareFoundation/dna/pulls)
 - [GitHub project page](https://github.com/AcademySoftwareFoundation/dna)
 - [The DNA project was established by this proposal](https://github.com/AcademySoftwareFoundation/tac/issues/1040)
-- [ASWF's Machine Learning Working Group proposal](https://github.com/AcademySoftwareFoundation/tac/issues/1029) -- describes the purpose and scope of MLWG. Join the [ASWF Slack](https://slack.aswf.io/) -- join for the #wg-ml channel for the discussions about Machine Learning
+- [ASWF's Machine Learning Working Group proposal](https://github.com/AcademySoftwareFoundation/tac/issues/1029) -- describes the purpose and scope of MLWG. Join the [ASWF Slack](https://slack.aswf.io/) -- join for the #wg-ml, #dna, and ##dailies-notes-assistant-tech channels for the discussions about Machine Learning and Dailies Notes Assistant
 
 ## ☎️ Contributing and Developer Documentation