installation: document post-installation steps

helm/reana/templates/NOTES.txt

@@ -1 +1,22 @@
-Thanks for flying REANA 🚀
+
+The REANA system has been installed:
+
+There are a few steps left to finalise it's configuration
+
+1. Get the REANA-Server pod name:
+
+    $ REANA_SERVER=$(kubectl get pod -l "app={{ .Release.Name }}-server" -o name -o jsonpath='{.items[0].metadata.name}')
+
+2. Initialise the database:
+
+    $ kubectl exec $REANA_SERVER -- ./scripts/setup
+
+2. Create your administrator user and store the token:
+
+    $ kubectl exec $REANA_SERVER -- flask reana-admin create-admin-user user@my.org
+    <reana-admin-access-token-value>
+    $ read -s REANA_ADMIN_ACCESS_TOKEN  # paste the secret here
+    $ kubectl create secret generic {{ .Release.Name }}-admin-access-token \
+      --from-literal=ADMIN_ACCESS_TOKEN='$REANA_ADMIN_ACCESS_TOKEN'
+
+Thanks for flying REANA 🚀

helm/reana/templates/reana-server.yaml

@@ -37,12 +37,12 @@ spec:
           name: http
         {{- if .Values.debug.enabled }}
         command: ["/bin/sh", "-c"]
-        args: ["set -e; ./scripts/setup; invenio run -h 0.0.0.0 -p 5000"]
+        args: ["invenio run -h 0.0.0.0 -p 5000"]
         tty: true
         stdin: true
         {{- else }}
         command: ["/bin/sh", "-c"]
-        args: ["./scripts/setup > /var/log/reana-server-init-output.log 2>&1 && uwsgi --ini /var/reana/uwsgi/uwsgi.ini"]
+        args: ["uwsgi --ini /var/reana/uwsgi/uwsgi.ini"]
         {{- end }}
         volumeMounts:
           {{- if .Values.debug.enabled }}