Refactor project branding from HexaHost to Axiom across all configurations, documentation, and code files. Update environment variables, Docker setup, and README to reflect the new brand name. Ensure consistency in naming conventions and improve clarity in setup instructions.

dashboard/Dockerfile

@@ -1,4 +1,4 @@
-# HexaHost Dashboard (Next.js)
+# Axiom Dashboard (Next.js)
 FROM node:20-alpine AS deps
 WORKDIR /app
 COPY package.json package-lock.json* ./
@@ -10,8 +10,8 @@ COPY --from=deps /app/node_modules ./node_modules
 COPY . .
 
 # Build-time public env (overridden at runtime where possible)
-ARG NEXT_PUBLIC_BRAND_NAME=HexaHost
-ARG NEXT_PUBLIC_BRAND_NAME_WORD=HH
+ARG NEXT_PUBLIC_BRAND_NAME=Axiom
+ARG NEXT_PUBLIC_BRAND_NAME_WORD=AX
 ARG NEXT_PUBLIC_ADMIN_IDS=
 ARG NEXT_PUBLIC_API_URL=