README updated

README.md

@@ -6,7 +6,6 @@
 
 - Docker Destop for Mac or Windows OR docker-ce + docker-compose for Linux
 
-
 ### Building the application image
 
 In the root of the project run:
@@ -19,9 +18,13 @@ Start the development stack:
 
     $ .docker/dev.sh up
 
-(If the app and/or web container images are not present, they will be built
+(If the app image is not present, it will be built
 before the stack comes up.)
 
+To initialize the development database for Rails, run the command:
+
+    $ .docker/dev.sh exec app bin/rails db:setup
+
 To run a Bash shell on the development app server:
 
     $ .docker/dev.sh exec app bash
@@ -30,6 +33,9 @@ Stop the development stack:
 
     $ .docker/dev.sh down
 
+(If you use `Ctrl-C`to interrupt the stack running in the foreground, `dev.sh`
+has a trap to run `docker-compose down` to clean up resources.)
+
 ## Test Environment
 
 To get an interactive shell with the test stack, run: