Update Documentation

docs/DEDICATED_SERVER.md

@@ -4,12 +4,7 @@ The dedicated server is a version of Minecraft: Pi Edition modified to run in a
 This server is also compatible with MCPE Alpha v0.6.1[^1].
 
 ## Setup
-
-### Debian Package
-To use, install and run ``minecraft-pi-reborn-server``. It will generate the world and ``server.properties`` in the current directory.
-
-### Docker Image
-An official Docker image is also provided: [thebrokenrail/minecraft-pi-reborn-server](https://hub.docker.com/r/thebrokenrail/minecraft-pi-reborn-server).
+To use, install and run the ``minecraft-pi-reborn-server`` AppImage. It will generate the world and ``server.properties`` in the current directory.
 
 ## Server Limitations
 * Player data is not saved because of limitations with MCPE LAN worlds

docs/INSTALL.md

@@ -5,6 +5,9 @@ Download packages [here](https://gitea.thebrokenrail.com/minecraft-pi-reborn/min
 
 ### System Requirements
 * Debian Buster/Ubuntu 18.04 Or Higher
+* FUSE 2
+  * Debian/Ubuntu: ``sudo apt install libfuse2``
+  * Arch: ``sudo pacman -S fuse2``
 * Client-Only Dependencies
   * Graphics Drivers
   * GTK+ 3

launcher/src/client/launcher.cpp

@@ -150,6 +150,13 @@ int main(int argc, char *argv[]) {
         ERR("$HOME Isn't Set");
     }
 
+    // Check For Display
+#ifndef MCPI_HEADLESS_MODE
+    if (getenv("DISPLAY") == NULL || getenv("WAYLAND_DISPLAY") == NULL) {
+        ERR("No display attached! Make sure $DISPLAY or $WAYLAND_DISPLAY is set.");
+    }
+#endif
+
     // Print Features
     for (int i = 1; i < argc; i++) {
         if (strcmp(argv[i], "--print-available-feature-flags") == 0) {