make default avatar template actually work in discord

.vscode/settings.json

@@ -0,0 +1,4 @@
+{
+    "java.configuration.updateBuildConfiguration": "automatic",
+    "java.home": "/usr/lib/jvm/java-8-openjdk/"
+}

README.md

@@ -163,6 +163,13 @@ matterbridge
 
 now start the server with matterlink (and forgelin) in the mods folder
 
-and then [RTFM!!!](https://github.com/42wim/matterbridge#configuration) and configure all your needed gateways, endpoints etc
+and then [configure](https://github.com/42wim/matterbridge#configuration) all your needed gateways, endpoints etc
 
-powered by wishful thinking
+### Building
+
+```bash
+git clone --recursive https://git.lain.faith/sorceress/MatterLink.git
+cd MatterLink/
+./gradlew setupDecompWorkspace
+./gradlew build
+```

core/src/main/kotlin/matterlink/config/BaseConfig.kt

@@ -193,7 +193,7 @@ data class BaseConfig(val rootDir: File) {
 
     data class AvatarOptions(
         val enable: Boolean = true,
-        val urlTemplate: String = "https://visage.surgeplay.com/head/512/{uuid}",
+        val urlTemplate: String = "https://mc-heads.net/head/{uuid}",
         val systemUserAvatar: String = ""
     )
 
@@ -584,6 +584,11 @@ data class BaseConfig(val rootDir: File) {
                             "urlTemplate",
                             urlTemplate,
                             "template for constructing the user avatar url using the uuid"
+                        ),
+                        systemUserAvatar = it.getOrDefault(
+                            "systemUserAvatar",
+                            systemUserAvatar,
+                            "avatar url for the system user"
                         )
                     )
                 }