Use bash script for setup

Dockerfile

@@ -167,7 +167,10 @@ COPY docker/nginx/asciinema.conf /etc/nginx/sites-available/default
 RUN mkdir -p /var/log/supervisor
 COPY docker/supervisor/asciinema.conf /etc/supervisor/conf.d/asciinema.conf
 
-# add start script for Clojure app
+# add setup script
+
+COPY docker/bin /app/docker/bin
+ENV PATH "/app/docker/bin:${PATH}"
 
 ENV A2PNG_BIN_PATH "/app/a2png/a2png.sh"
 

docker/bin/setup

@@ -0,0 +1,6 @@
+#!/usr/bin/env bash
+
+set -e
+
+bundle exec rake db:migrate
+bundle exec rake db:seed

docs/INSTALL.md

@@ -120,7 +120,7 @@ Start PostgreSQL container (skip this if you use existing PostgreSQL server):
 
 Create database schema and seed it with initial data:
 
-    docker-compose run --rm web bundle exec rake db:setup
+    docker-compose run --rm web setup
 
 ### Create containers