feat(bot): ✨ Migrate from Citus to PostgreSQL.

README.md

@@ -167,47 +167,14 @@ kubectl apply -f k8s/secrets.yml
 If you see a ConfigMap and a Secret being created, that means you've successfully applied the
 changes.
 
-#### Setting Up Redis
+#### Setting Up Redis and PostgreSQL
 
 Now, you can initialize Redis. This step is pretty straightforward and you can forget about it
 later.
 
 ```sh
 kubectl apply -f k8s/redis.yml
-```
-
-#### Setting Up Citus Database
-
-This step requires some updates in the `k8s/citus.yml` file. Open the file and make sure that the
-default amount of replicas fits your needs. At least one is needed.
-
-```sh
-kubectl apply -f k8s/citus.yml
-```
-
-Once all the nodes are up and running, you have to connect them. The node `citus-0` is always used
-as the coordinator node. Run the following command to set the coordinator host:
-
-```sh
-kubectl exec citus-0 -- psql -U payphone payphone -c "SELECT citus_set_coordinator_host('citus-0.citus-headless.default.svc.cluster.local', 5432);"
-```
-
-Once that command was run, you need to add the rest of the nodes to the cluster. To do that, run
-the following command replacing `<node-index>` with the index of the node you're adding, once per
-node.
-
-```sh
-kubectl exec citus-0 -- psql -U payphone payphone -c "SELECT * from citus_add_node('citus-<node-index>.citus-headless.default.svc.cluster.local', 5432);"
-```
-
-For example, if you had 3 replicas in total, you'd run the command 2 times, once for node 1 and
-once for node 2 (node 0 is the coordinator, so you don't have to add it).
-
-As an optional step, you can check that the nodes were successfully connected running the following
-command, which will show all the nodes connected:
-
-```sh
-kubectl exec citus-0 -- psql -U payphone payphone -c "SELECT * FROM citus_get_active_worker_nodes();"
+kubectl apply -f k8s/psql.yml
 ```
 
 #### Setting Up Payphone