feat(talk/turn/signaling/hpb): add role for Talk with backend services

roles/talk/templates/janus.jcfg.j2

@@ -0,0 +1,28 @@
+general: {
+  configs_folder = "/usr/local/etc/janus"
+  log_to_stdout = true
+}
+
+nat: {
+  nat_1_1_mapping = "{{ talk_janus_public_ip }}"
+  ice_lite = {{ talk_janus_ice_lite | string | lower }}
+  ice_tcp = {{ talk_janus_ice_tcp | string | lower }}
+
+  stun_server = "{{ talk_janus_stun_server }}"
+  stun_port = {{ talk_janus_stun_port }}
+
+  rtp_port_range = "{{ talk_janus_rtp_port_min }}-{{ talk_janus_rtp_port_max }}"
+}
+
+media: {
+  rtp_port_range = "{{ talk_janus_rtp_port_min }}-{{ talk_janus_rtp_port_max }}"
+}
+
+transports: {
+  websockets: {
+    ws = true
+    ws_port = 8188
+    ws_interface = "0.0.0.0"
+    ws_ip = "0.0.0.0"
+  }
+}