fix(deploy): bust Docker build cache for Next.js client build

Dockerfile

@@ -9,8 +9,10 @@ WORKDIR /app
 
 ARG NEXT_PUBLIC_SUPABASE_URL
 ARG NEXT_PUBLIC_SUPABASE_ANON_KEY
+ARG BUILD_CACHE_BUSTER
 ENV NEXT_PUBLIC_SUPABASE_URL=${NEXT_PUBLIC_SUPABASE_URL}
 ENV NEXT_PUBLIC_SUPABASE_ANON_KEY=${NEXT_PUBLIC_SUPABASE_ANON_KEY}
+ENV BUILD_CACHE_BUSTER=${BUILD_CACHE_BUSTER}
 
 COPY --from=deps /app/node_modules ./node_modules
 COPY . .