app/matrix: add coturn deployment

TURN server is required for proper cross-NAT voice/video calls via
Matrix.

Change-Id: I8182292dd8ef30690ae4b9487c22aedcff098710
Reviewed-on: https://gerrit.hackerspace.pl/c/hscloud/+/1387
Reviewed-by: informatic <informatic@hackerspace.pl>
diff --git a/app/matrix/matrix.hackerspace.pl.jsonnet b/app/matrix/matrix.hackerspace.pl.jsonnet
index 14a0366..4199e0e 100644
--- a/app/matrix/matrix.hackerspace.pl.jsonnet
+++ b/app/matrix/matrix.hackerspace.pl.jsonnet
@@ -36,6 +36,13 @@
                 password: std.strReplace(importstr "secrets/plain/media-repo-matrix-postgres", "\n", ""),
             },
         },
+        coturn+: {
+            enable: true,
+            config+: {
+                domain: "turn.hackerspace.pl",
+                loadBalancerIP: "185.236.240.59",
+            },
+        },
     },
 
     riot+: {