build(confidence-engine) fix dockerfile env var

Dockerfile

@@ -3,26 +3,27 @@ FROM node:22-alpine AS builder
 
 WORKDIR /app
 
-ENV NEXT_PUBLIC_SUPABASE_URL="" \
-    NEXT_PUBLIC_SUPABASE_ANON_KEY=""
+ARG NEXT_PUBLIC_SUPABASE_URL
+ARG NEXT_PUBLIC_SUPABASE_ANON_KEY
+
+ENV NEXT_PUBLIC_SUPABASE_URL=${NEXT_PUBLIC_SUPABASE_URL} \
+    NEXT_PUBLIC_SUPABASE_ANON_KEY=${NEXT_PUBLIC_SUPABASE_ANON_KEY}
 
 COPY package.json package-lock.json* yarn.lock* pnpm-lock.yaml* ./
 
 RUN corepack enable && \
     if [ -f pnpm-lock.yaml ]; then \
-        corepack prepare pnpm@latest --activate; \
-        pnpm install --frozen-lockfile; \
+    corepack prepare pnpm@latest --activate; \
+    pnpm install --frozen-lockfile; \
     elif [ -f yarn.lock ]; then \
-        yarn install --frozen-lockfile; \
+    yarn install --frozen-lockfile; \
     else \
-        npm ci; \
+    npm ci; \
     fi
 
 COPY . .
 
-RUN NEXT_PUBLIC_SUPABASE_URL=${NEXT_PUBLIC_SUPABASE_URL} \
-    NEXT_PUBLIC_SUPABASE_ANON_KEY=${NEXT_PUBLIC_SUPABASE_ANON_KEY} \
-    next build
+RUN npm run build
 
 # ── Stage 2: Production runtime ────────────────────────────────────────
 FROM node:22-alpine AS runner