[bitnami/postgresql] docs: 📝 Add note about using the container entrypoint (#9160)

Signed-off-by: Javier Salmeron Garcia <jsalmeron@vmware.com>

bitnami/postgresql/templates/NOTES.txt

@@ -16,7 +16,7 @@ Get the list of pods by executing:
 
 Access the pod you want to debug by executing
 
-  kubectl exec --namespace {{ .Release.Namespace }} -ti <NAME OF THE POD> -- bash
+  kubectl exec --namespace {{ .Release.Namespace }} -ti <NAME OF THE POD> -- /opt/bitnami/scripts/postgresql/entrypoint.sh /bin/bash
 
 In order to replicate the container startup scripts execute this command:
 
@@ -58,6 +58,8 @@ To connect to your database run the following command:
     kubectl run {{ include "common.names.fullname" . }}-client --rm --tty -i --restart='Never' --namespace {{ .Release.Namespace }} --image {{ include "postgresql.image" . }} --env="PGPASSWORD=$POSTGRES_PASSWORD" \
       --command -- psql --host {{ include "postgresql.primary.fullname" . }} -U {{ default "postgres" $customUser }} -d {{- if include "postgresql.database" . }} {{ include "postgresql.database" . }}{{- else }} postgres{{- end }} -p {{ include "postgresql.service.port" . }}
 
+    > NOTE: If you access the container using bash, make sure that you execute "/opt/bitnami/scripts/entrypoint.sh /bin/bash" in order to avoid the error "psql: local user with ID {{ .Values.primary.containerSecurityContext.runAsUser }}} does not exist"
+
 To connect to your database from outside the cluster execute the following commands:
 
 {{- if contains "NodePort" .Values.primary.service.type }}