Update README and add DCO

Author: robtaylor

DCO.md

@@ -0,0 +1,40 @@
+---
+title: Developer Certificate of Origin
+---
+
+```
+Developer Certificate of Origin
+Version 1.1
+
+Copyright (C) 2004, 2006 The Linux Foundation and its contributors.
+
+Everyone is permitted to copy and distribute verbatim copies of this
+license document, but changing it is not allowed.
+
+
+Developer's Certificate of Origin 1.1
+
+By making a contribution to this project, I certify that:
+
+(a) The contribution was created in whole or in part by me and I
+    have the right to submit it under the open source license
+    indicated in the file; or
+
+(b) The contribution is based upon previous work that, to the best
+    of my knowledge, is covered under an appropriate open source
+    license and I have the right under that license to submit that
+    work with modifications, whether created in whole or in part
+    by me, under the same open source license (unless I am
+    permitted to submit under a different license), as indicated
+    in the file; or
+
+(c) The contribution was provided directly to me by some other
+    person who certified (a), (b) or (c) and I have not modified
+    it.
+
+(d) I understand and agree that this project and the contribution
+    are public and that a record of the contribution (including all
+    personal information I submit with it, including my sign-off) is
+    maintained indefinitely and may be redistributed consistent with
+    this project or the open source license(s) involved.
+```

README.md

@@ -1,29 +1,26 @@
 # ChipFlow library
 
-This is a small library to make working with the ChipFlow platform easy and straightforward.
+This is a library to make working with the ChipFlow platform easy and straightforward.
 
 ## Installation and usage
 
-This library uses [PDM](https://pdm.fming.dev/) for dependency management, testing, building, and publishing. Install PDM first. Then run:
+See the `ChipFlow docs <https://docs.chipflow.io>`__
 
-```
-pdm install
-```
 
-To run tests, use:
+## Contributing
 
-```shell
-pdm run test
-```
+We warmly accept [PRs](https://github.com/chipFlow/chipflow-lib/pulls)
+and [issues](https://github.com/ChipFlow/chipflow-lib/issues), and are
+always happy for folk to join in [GitHub Discussions](https://github.com/ChipFlow/chipflow-central/discussions)
 
-To run lints, use:
 
-```shell
-pdm run lint
-```
+Code contributions must pass the following checks:
+- `pdm lint`
+- `pdm test`
 
-Your contributions must pass the lint check to be included in the repository.
+Also, do note we have a [DCO](https://developercertificate.org/), and require sign-offs from external contributors.
 
+Happy hacking!
 
 ## License