README.md: add sr.ht related documentation from gioui.org

Use https for the Unlicense URL and add one for MIT as well.

Signed-off-by: Elias Naur <mail@eliasnaur.com>

LICENSE

@@ -24,7 +24,7 @@ OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 OTHER DEALINGS IN THE SOFTWARE.
 
-For more information, please refer to <http://unlicense.org/>
+For more information, please refer to <https://unlicense.org/>
 
 
 

README.md

@@ -2,3 +2,21 @@
 
 Immediate mode GUI programs in Go. See [gioui.org](https://gioui.org)
 for details and documentation.
+
+## Issues
+
+File bugs and TODOs through the [issue tracker](https://todo.sr.ht/~eliasnaur/gio) or send an email
+to [~eliasnaur/gio@todo.sr.ht](mailto:~eliasnaur/gio@todo.sr.ht). For general discussion, use the
+mailing list: [~eliasnaur/gio@lists.sr.ht](mailto:~eliasnaur/gio@lists.sr.ht).
+
+## Contributing
+
+Post discussion and patches to the [mailing list](https://lists.sr.ht/~eliasnaur/gio). No Sourcehut
+account is required and you can post without being subscribed.
+
+See the [contribution guide](https://gioui.org/doc/contribute) for more details.
+
+
+## License
+
+Dual-licensed under [UNLICENSE](https://unlicense.org) or the [MIT](https://spdx.org/licenses/MIT.html).