update README

README.md

@@ -6,13 +6,35 @@ club accounts and memberships. See [architecture.md](architecture.md) for an
 overview of its architecture.
 
 ## Development
-First, make sure that you have installed the
+### Docker
+If you are not modifying code related to email or Mailman, then you may use
+Docker containers instead, which are much easier to work with than the VM.
+```
+docker.sh up
+```
+This will create some containers with the bare minimum necessary for ceod to
+run. Run `docker logs -f phosphoric-acid` and wait until you see the line
+`sleep infinity`. Then attach to each of phosphoric-acid, mail and coffee,
+and start ceod (see 'Running the application', below). Once inside a container,
+make sure to `cd` into the current working directory on the host.
+
+To use ceo, run the following inside the phosphoric-acid container:
+```
+login
+<username is ctdalek, password is krb5>
+<cd into your directory OUTSIDE the container>
+. venv/bin/activate
+python -m ceo
+```
+This should bring up the TUI.
+
+### VM
+If you are making changes related to email or Mailman, you will need the full
 [syscom dev environment](https://git.uwaterloo.ca/csc/syscom-dev-environment).
 This will setup all of the services needed for ceo to work. You should clone
 this repo in the phosphoric-acid container under ctdalek's home directory; you
 will then be able to access it from any container thanks to NFS.
 
-### Environment setup
 Once you have the dev environment setup, there are a few more steps you'll
 need to do for ceo.
 
@@ -148,8 +170,16 @@ is running. Stop the flask app (Ctrl-C), run `clear_cache.sh`, then
 restart the app.
 
 ## Interacting with the application
-The client part of ceo hasn't been written yet, so we'll use curl to
-interact with ceod for now.
+To use the TUI:
+```
+python -m ceo
+```
+To use the CLI:
+```
+python -m ceo --help
+```
+
+Alternatively, you may use curl to send HTTP requests.
 
 ceod uses [SPNEGO](https://en.wikipedia.org/wiki/SPNEGO) for authentication,
 and TLS for confidentiality and integrity. In development mode, TLS can be