feat: Store update restart context in the deployment directory and configure Docker to use the default bun user.

shared/modules/admin/update.service.ts

@@ -1,6 +1,7 @@
 import { exec, type ExecException } from "child_process";
 import { promisify } from "util";
 import { writeFile, readFile, unlink } from "fs/promises";
+import * as path from "path";
 import { Client, TextChannel } from "discord.js";
 import { getPostRestartEmbed, getPostRestartProgressEmbed, type PostRestartProgress } from "@/modules/admin/update.view";
 import type { PostRestartResult } from "@/modules/admin/update.view";
@@ -270,7 +271,8 @@ export class UpdateService {
      * Prepare restart context with rollback info
      */
     static async prepareRestartContext(context: RestartContext): Promise<void> {
-        await writeFile(this.CONTEXT_FILE, JSON.stringify(context));
+        const filePath = path.join(this.getDeployDir(), this.CONTEXT_FILE);
+        await writeFile(filePath, JSON.stringify(context));
     }
 
     /**
@@ -325,7 +327,8 @@ export class UpdateService {
 
     private static async loadRestartContext(): Promise<RestartContext | null> {
         try {
-            const contextData = await readFile(this.CONTEXT_FILE, "utf-8");
+            const filePath = path.join(this.getDeployDir(), this.CONTEXT_FILE);
+            const contextData = await readFile(filePath, "utf-8");
             return JSON.parse(contextData) as RestartContext;
         } catch {
             return null;
@@ -475,7 +478,8 @@ export class UpdateService {
 
     private static async cleanupContext(): Promise<void> {
         try {
-            await unlink(this.CONTEXT_FILE);
+            const filePath = path.join(this.getDeployDir(), this.CONTEXT_FILE);
+            await unlink(filePath);
         } catch {
             // File may not exist, ignore
         }