docker file fix

Dockerfile

@@ -9,6 +9,16 @@ RUN npm ci
 FROM base AS builder
 WORKDIR /app
 RUN apk add --no-cache openssl
+# NEXT_PUBLIC_* vars are inlined into the client bundle at build time. Pass
+# them via build args (Coolify: mark them as build variables) or the browser
+# ClerkProvider / public URLs will be missing.
+ARG NEXT_PUBLIC_CLERK_PUBLISHABLE_KEY
+ARG NEXT_PUBLIC_CLERK_SIGN_IN_URL
+ARG NEXT_PUBLIC_CLERK_SIGN_UP_URL
+ARG NEXT_PUBLIC_CLERK_SIGN_IN_FALLBACK_REDIRECT_URL
+ARG NEXT_PUBLIC_CLERK_SIGN_UP_FALLBACK_REDIRECT_URL
+ARG NEXT_PUBLIC_APP_URL
+ARG NEXT_PUBLIC_APP_DOMAIN
 COPY --from=deps /app/node_modules ./node_modules
 COPY package.json package-lock.json ./
 COPY next.config.ts ./