add Supabase configuration to staging environment and update Dockerfile to include .env.staging

Dockerfile

@@ -11,6 +11,7 @@ COPY packages packages
 COPY tooling tooling
 COPY .env .env
 COPY .env.production .env.production
+COPY .env.staging .env.staging
 
 # Load env file and echo a specific variable
 # RUN dotenv -e .env -- printenv | grep 'SUPABASE' || true
@@ -20,13 +21,10 @@ COPY . .
 
 ENV NODE_ENV=production
 
-# 🔍 Optional: Log key envs for debug
-RUN echo "📄 .env.production contents:" && cat .env.production \
- && echo "🔧 Current ENV available to Next.js build:" && printenv | grep -E 'SUPABASE|STRIPE|NEXT|NODE_ENV' || true
-
 RUN set -a \
  && . .env \
  && . .env.production \
+ && . .env.staging \
  && set +a \
  && node check-env.js \
  && pnpm build
@@ -34,18 +32,21 @@ RUN set -a \
 
 # --- Stage 2: Runtime ---
 FROM node:20-alpine
+ARG APP_ENV=production
 
 WORKDIR /app
 
 COPY --from=builder /app ./
 
+RUN cp ".env.${APP_ENV}" .env.local
+
 RUN npm install -g pnpm@9 \
  && pnpm install --prod --frozen-lockfile
 
 ENV NODE_ENV=production
 
 # 🔍 Optional: Log key envs for debug
-RUN echo "📄 .env.production contents:" && cat .env.production \
+RUN echo "📄 .env contents:" && cat .env.local \
  && echo "🔧 Current ENV available to Next.js build:" && printenv | grep -E 'SUPABASE|STRIPE|NEXT|NODE_ENV' || true