Small improvements to tutorial and launching rails console. (#214)

docs/how-to/access--the-rails-console.md

@@ -17,14 +17,9 @@ Then ssh into the Discourse unit:
 ```
 juju ssh --container discourse discourse-k8s/leader bash   
 ```
-Now populate the required environment variables, this requires charm revision 70 or greater:
+Now access the console using Pebble:
 ```
-sudo -u _daemon_ xargs -0 -L1 -a "/proc/$(ps aux | awk '/[u]nicorn master/ {print $2;exit}')/environ" | awk '{FS="=";print "export " $1 "=\"" $2 "\""}' > /root/envi && . /root/envi && rm /root/envi
-```
-Now change to the appropriate directory and execute the command to access the console:
-```
-cd /srv/discourse/app
-RAILS_ENV=production bin/bundle exec rails console
+pebble exec --user=_daemon_ --context=discourse -w=/srv/discourse/app -ti -- /srv/discourse/app/bin/bundle exec rails console
 ```
 If the output of the last command contains something similar to this:
 ```

docs/tutorial.md

@@ -21,7 +21,7 @@ All the above charms will the deployed in a new model named `discourse`:
 juju add-model discourse
 
 # Deploy the charms
-juju deploy redis-k8s
+juju deploy redis-k8s --channel latest/edge
 juju deploy postgresql-k8s --channel 14/stable --trust
 juju deploy discourse-k8s
 
@@ -31,7 +31,7 @@ juju config postgresql-k8s plugin_pg_trgm_enable=True
 
 # Relate redis-k8s and postgresql-k8s to discourse-k8s
 juju relate redis-k8s discourse-k8s
-juju relate discourse-k8s postgresql-k8s:db
+juju relate discourse-k8s postgresql-k8s
 
 ```