Enhance image upload and background management: Update Docker configuration to create a dedicated backgrounds directory for uploaded images, modify API routes to handle background images specifically, and improve README documentation to reflect these changes. Additionally, refactor components to utilize the new Avatar component for consistent avatar rendering across the application.

components/Avatar.tsx

@@ -0,0 +1,66 @@
+"use client";
+
+import { useState, useEffect, useRef } from "react";
+
+interface AvatarProps {
+  src: string | null | undefined;
+  username: string;
+  size?: "xs" | "sm" | "md" | "lg" | "xl" | "2xl";
+  className?: string;
+  borderClassName?: string;
+  fallbackText?: string;
+}
+
+const sizeClasses = {
+  xs: "w-6 h-6 text-[8px]",
+  sm: "w-8 h-8 text-[10px]",
+  md: "w-10 h-10 text-xs",
+  lg: "w-16 h-16 sm:w-20 sm:h-20 text-xl sm:text-2xl",
+  xl: "w-24 h-24 text-4xl",
+  "2xl": "w-32 h-32 text-4xl",
+};
+
+export default function Avatar({
+  src,
+  username,
+  size = "md",
+  className = "",
+  borderClassName = "",
+  fallbackText,
+}: AvatarProps) {
+  const [avatarError, setAvatarError] = useState(false);
+  const prevSrcRef = useRef<string | null | undefined>(undefined);
+
+  // Reset error state when src changes
+  useEffect(() => {
+    if (src !== prevSrcRef.current) {
+      prevSrcRef.current = src;
+      setAvatarError(false);
+    }
+  }, [src]);
+
+  const sizeClass = sizeClasses[size];
+  const displaySrc = src && !avatarError ? src : null;
+  const initial = fallbackText || username.charAt(0).toUpperCase();
+
+  return (
+    <div
+      className={`${sizeClass} rounded-full border overflow-hidden bg-black/60 flex items-center justify-center relative ${className} ${borderClassName}`}
+    >
+      {displaySrc ? (
+        <img
+          key={displaySrc}
+          src={displaySrc}
+          alt={username}
+          className="w-full h-full object-cover absolute inset-0"
+          onError={() => setAvatarError(true)}
+        />
+      ) : null}
+      <span
+        className={`text-pixel-gold font-bold ${displaySrc ? "hidden" : ""}`}
+      >
+        {initial}
+      </span>
+    </div>
+  );
+}