Add docs on Docker support

Author: cburgdorf

README.md

@@ -112,6 +112,24 @@ git push && git push --tags
 make release
 ```
 
+To create a docker image:
+
+```sh
+make create-docker-image version=<version>
+```
+
+By default, this will create a new image with two tags pointing to it:
+- `ethereum/trinity:<version>` (explicit version)
+- `ethereum/trinity:latest` (latest until overwritten with a future "latest")
+
+Then, push to docker hub.
+
+```sh
+docker push ethereum/trinity:<version>
+# the following may be left out if we were pushing a patch for an older version
+docker push ethereum/trinity:latest
+```
+
 
 #### How to bumpversion
 

docs/guides/trinity/quickstart.rst

@@ -61,8 +61,8 @@ changes need to be made to the host system apart from having ``Docker`` itself i
 
 .. note::
   While we don't officially support Windows just yet, running Trinity through ``Docker`` is a great
-  way to bypass this current limitation as Trinity can run on any system that runs ``Docker``,
-  including Windows.
+  way to bypass this current limitation as Trinity can run on any system that runs ``Docker`` [with
+  support for linux containers](https://docs.docker.com/docker-for-windows/#switch-between-windows-and-linux-containers).
 
 Using ``Docker`` we have two different options to choose from.
 
@@ -94,7 +94,7 @@ our very own image directly from the source code.
 
   make create-docker-image version=my-own-version
 
-After the images was built successfully we can run it by invoking:
+After the image has been successfully created, we can run it by invoking:
 
 .. code:: sh