Move ice-servers.json under dataDir.

This makes it easier to deploy by putting all user-serviceable files
under data/.

README

@@ -15,7 +15,7 @@ Set the server administrator's username and password (optional):
 
 Configure the list of STUN and TURN servers (optional):
 
-    vi static/ice-servers.json
+    vi data/ice-servers.json
 
 Set up a group
 

sfu.go

@@ -81,7 +81,7 @@ func main() {
 		}()
 	}
 
-	iceFilename = filepath.Join(staticRoot, "ice-servers.json")
+	iceFilename = filepath.Join(dataDir, "ice-servers.json")
 
 	go readPublicGroups()
 	webserver()

webserver.go

@@ -24,7 +24,8 @@ func webserver() {
 	http.HandleFunc("/group/",
 		func(w http.ResponseWriter, r *http.Request) {
 			mungeHeader(w)
-			http.ServeFile(w, r, staticRoot+"/sfu.html")
+			http.ServeFile(w, r,
+				filepath.Join(staticRoot, "sfu.html"))
 		})
 	http.HandleFunc("/recordings",
 		func(w http.ResponseWriter, r *http.Request) {
@@ -33,6 +34,12 @@ func webserver() {
 		})
 	http.HandleFunc("/recordings/", recordingsHandler)
 	http.HandleFunc("/ws", wsHandler)
+	http.HandleFunc("/ice-servers.json",
+		func(w http.ResponseWriter, r *http.Request) {
+			mungeHeader(w)
+			http.ServeFile(w, r,
+				filepath.Join(dataDir, "ice-servers.json"))
+		})
 	http.HandleFunc("/public-groups.json", publicHandler)
 	http.HandleFunc("/stats", statsHandler)