README.md.erb in welaika-suspenders-2.34

- old
+ new

@@ -2,14 +2,20 @@
 
 ## Getting Started
 
 To install Ruby, read the [rbenv guide](https://github.com/rbenv/rbenv#installation)
 
-To install Postgres:
+To install Postgres 11:
 
-    $ brew install postgresql@10
+    $ brew install postgresql@<%= Suspenders::POSTGRES_VERSION %>
 
+or
+
+    $ brew install postgresql
+
+if `postgresql@<%= Suspenders::POSTGRES_VERSION %>` does not exist yet.
+
 To install Node:
 
     $ brew install node
 
 (or use [nvm](https://github.com/creationix/nvm) if you want).
@@ -42,14 +48,14 @@
 
 ### Database
 
 https://elements.heroku.com/addons/heroku-postgresql
 
-Choose the PostgreSQL version you want to use (e.g. 10):
+Choose the PostgreSQL version you want to use:
 
-    $ heroku addons:create heroku-postgresql:hobby-dev --version=10 --remote=staging
-    $ heroku addons:create heroku-postgresql:hobby-dev --version=10 --remote=production
+    $ heroku addons:create heroku-postgresql:hobby-dev --version=<%= Suspenders::POSTGRES_VERSION %> --remote=staging
+    $ heroku addons:create heroku-postgresql:hobby-dev --version=<%= Suspenders::POSTGRES_VERSION %> --remote=production
 
 Further reading:
 
 https://devcenter.heroku.com/articles/heroku-postgres-plans
 
@@ -86,10 +92,10 @@
 
 Since our `Dockerfile` is called `Dockerfile.gitlab`, the commands are slightly different:
 
 
 ```bash
-$ docker build -f Dockerfile.gitlab -t registry.gitlab.com/welaika/<%= app_name %> .
+$ docker build --no-cache -f Dockerfile.gitlab -t registry.gitlab.com/welaika/<%= app_name %> .
 $ docker push registry.gitlab.com/welaika/<%= app_name %>
 ```
 
 Eventually, you can lint Dockerfiles with [hadolint](https://github.com/hadolint/hadolint)