Add Docker image, Compose, CI/CD workflows and docs

- Multi-arch (amd64/arm64) panel image: static musl binary on scratch,
  cross-compiled with cargo-zigbuild (no QEMU), non-root, healthcheck
- docker-compose.yml + .env.example for one-command deployment
- CI: fmt, clippy, tests, web type-checks, Windows launcher build,
  real-network installs of vanilla/Fabric/Quilt/Forge/NeoForge,
  Docker build
- Release: Windows NSIS installer with baked-in panel URL, GHCR image
  push and GitHub release (tag push or manual dispatch)
- README, admin guide, Microsoft auth setup, architecture, development
- rustfmt config and formatting pass

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_011ARcGWxLx21FwXJ3yfGriS

launcher/src-tauri/src/game.rs

@@ -134,7 +134,15 @@ pub async fn run(app: AppHandle, instance_id: String, start: bool, deep: bool) -
     let auth = auth.unwrap();
 
     report(Event::Stage { stage: Stage::Launching, label: "Starting Minecraft".into() });
-    let pick = |a: u32, b: u32, c: u32| if a > 0 { a } else if b > 0 { b } else { c };
+    let pick = |a: u32, b: u32, c: u32| {
+        if a > 0 {
+            a
+        } else if b > 0 {
+            b
+        } else {
+            c
+        }
+    };
     let max = pick(ov.memory_max_mb, settings.memory_max_mb, inst.memory.max_mb).max(512);
     let min = pick(ov.memory_min_mb, settings.memory_min_mb, inst.memory.min_mb).min(max);
     let mut jvm = launch::split_args(&inst.jvm_args);
@@ -200,7 +208,13 @@ pub async fn run(app: AppHandle, instance_id: String, start: bool, deep: bool) -
 
     // Stream logs to the UI in small batches (cheap IPC), keep a tail for crash reports.
     let (tx, mut rx) = tokio::sync::mpsc::unbounded_channel::<String>();
-    for stream in [child.stdout.take().map(|s| Box::new(s) as Box<dyn tokio::io::AsyncRead + Unpin + Send>), child.stderr.take().map(|s| Box::new(s) as Box<dyn tokio::io::AsyncRead + Unpin + Send>)].into_iter().flatten() {
+    for stream in [
+        child.stdout.take().map(|s| Box::new(s) as Box<dyn tokio::io::AsyncRead + Unpin + Send>),
+        child.stderr.take().map(|s| Box::new(s) as Box<dyn tokio::io::AsyncRead + Unpin + Send>),
+    ]
+    .into_iter()
+    .flatten()
+    {
         let tx = tx.clone();
         tokio::spawn(async move {
             let mut lines = BufReader::new(stream).lines();
@@ -268,7 +282,8 @@ pub async fn run(app: AppHandle, instance_id: String, start: bool, deep: bool) -
                 w.set_focus().ok();
             }
         }
-        app2.emit("game://exit", ExitPayload { instance_id: id2.clone(), code, crashed, tail: tail.into_iter().collect(), crash_report }).ok();
+        app2.emit("game://exit", ExitPayload { instance_id: id2.clone(), code, crashed, tail: tail.into_iter().collect(), crash_report })
+            .ok();
         emit_state(&app2, &id2, "idle", None);
     });
     Ok(())