fix "Try the demo app" in docs (#38)

* fix "Try the demo app" in docs

* fix "Get Started" setup in docs

config/dev.yml

@@ -93,7 +93,7 @@ database:
   port: 5432
   dbname: app_development
   user: postgres
-  password: ''
+  password: postgres
 
   #schema: "public"
   #pool_size: 10

config/prod.yml

@@ -54,7 +54,7 @@ database:
   port: 5432
   dbname: app_production
   user: postgres
-  password: ''
+  password: postgres
   #pool_size: 10
   #max_retries: 0
   #log_level: "debug" 

docker-compose.yml

@@ -1,9 +1,12 @@
 version: '3.4'
 services:
   db:
-    image: postgres
+    image: postgres:12
     ports:
       - "5432:5432"
+    environment:
+      POSTGRES_USER: postgres
+      POSTGRES_PASSWORD: postgres
 
   # redis:
   #   image: redis:alpine

docs/guide.md

@@ -34,6 +34,12 @@ Super Graph has a rich feature set like integrating with your existing Ruby on R
 # clone the repository
 git clone https://github.com/dosco/super-graph
 
+# run db in background
+docker-compose up -d db
+
+# see logs and wait until DB is really UP
+docker-compose logs db
+
 # setup the demo rails app & database and run it
 docker-compose run rails_app rake db:create db:migrate db:seed
 
@@ -1767,7 +1773,7 @@ database:
   port: 5432
   dbname: app_development
   user: postgres
-  password: ''
+  password: postgres
 
   #schema: "public"
   #pool_size: 10

examples/rails-app/config/database.yml

@@ -19,7 +19,7 @@ default: &default
   encoding: unicode
   host: db
   username: postgres
-  password:
+  password: postgres
   pool: 5
 
 development:

tmpl/dev.yml

@@ -109,7 +109,7 @@ database:
   port: 5432
   dbname: {% app_name_slug %}_development
   user: postgres
-  password: ''
+  password: postgres
 
   #schema: "public"
   #pool_size: 10

tmpl/prod.yml

@@ -54,7 +54,7 @@ database:
   port: 5432
   dbname: {% app_name_slug %}_development
   user: postgres
-  password: ''
+  password: postgres
   #pool_size: 10
   #max_retries: 0
   #log_level: "debug"