Add the kosmos-postgresql and ejabberd backup recipes

nodes/andromeda.kosmos.org.json

@@ -3,11 +3,20 @@
     "role[base]",
     "kosmos-base::andromeda_firewall",
     "role[ipfs_cluster_with_tls]",
+    "kosmos-postgresql",
+    "kosmos-ejabberd::backup",
     "kosmos-mediawiki",
     "sockethub",
     "sockethub::proxy",
     "kosmos-btcpayserver::proxy"
   ],
+  "normal": {
+    "postgresql": {
+      "password": {
+        "postgres": "iezah7ochae9uizu1Isha2Chuok8ra"
+      }
+    }
+  },
   "automatic": {
     "ipaddress": "andromeda.kosmos.org"
   }