Improve README, add quick start instructions

README.md

@@ -7,6 +7,27 @@ credentials, invites, donations, etc..
 
 ## Development
 
+### Quick Start
+
+The easiest way to get a working development setup is using Docker Compose like
+so:
+
+1. Make sure [Docker Compose is installed][1] and Docker is running (included in
+   Docker Desktop)
+2. Uncomment the `web` section in `docker-compose.yml`
+3. Run `docker compose up` and wait until 389ds announces its successful start
+   in the log output
+4. `docker-compose exec ldap dsconf localhost backend create --suffix="dc=kosmos,dc=org" --be-name="dev"`
+5. `docker compose run web rails ldap:setup`
+5. `docker compose run web rails db:setup`
+
+After these steps, you should have a working Rails app with a handful of test
+users running on [http://localhost:3000](http://localhost:3000).
+
+Log in with username "admin" and password "admin is admin". All users listed on
+[http://localhost:3000/admin/ldap_users](http://localhost:3000/admin/ldap_users)
+have the password "user is user".
+
 ### Rails app
 
 Installing dependencies:
@@ -37,15 +58,10 @@ There is a working Docker Compose config file, which allows you to spin up both
 an app server for Rails as well as a local 389ds (LDAP) server.
 
 By default, `docker-compose up` will only start the LDAP server, listening on
-port 389 on your machine. Uncomment other services in `docker-compose.yml`.
+port 389 on your machine. Uncomment other services in `docker-compose.yml` if
+you want to use them.
 
-Note that all 389ds data is stored in `tmp/389ds`. So if you want to start over
-with a fresh installation, delete both that directory as well as the container.
-
-### LDAP server
-
-See the previous section for quickly spinning up an LDAP server with Docker (or
-edit your environment configuration to use an existing one).
+#### LDAP server
 
 After creating the Docker container for the first time (or after deleting it),
 you need to run the following command once, in order to create the dirsrv
@@ -55,10 +71,13 @@ back-end:
 
 Now you can seed the back-end with data using this Rails task:
 
-    bundle exec rails ldap:seed
+    bundle exec rails ldap:setup
 
-The seeds task will first delete any existing entries in the directory tree
-("dc=kosmos,dc=org"), and then create our example/development entries.
+The setup task will first delete any existing entries in the directory tree
+("dc=kosmos,dc=org"), and then create our development entries.
+
+Note that all 389ds data is stored in `tmp/389ds`. So if you want to start over
+with a fresh installation, delete both that directory as well as the container.
 
 ## Documentation
 
@@ -87,3 +106,5 @@ The seeds task will first delete any existing entries in the directory tree
 ## License
 
 [GNU Affero General Public License v3.0](https://choosealicense.com/licenses/agpl-3.0/)
+
+[1]: https://docs.docker.com/compose/install/