fix: port 3000 > 3020, APP_DIR /opt/cirux > /home/ubuntu/cirux

Dockerfile

@@ -18,13 +18,16 @@ ENV NEXT_PUBLIC_SUPABASE_ANON_KEY=$NEXT_PUBLIC_SUPABASE_ANON_KEY
 
 RUN npm run build
 
-# Next.js standalone creates a subdirectory named after the project folder.
-# We flatten it to a known location so the runner doesn't depend on the name.
-RUN echo "=== Standalone output structure ===" && \
+# Flatten standalone output — find the single subdir Next.js creates
+RUN set -e && \
+    echo "=== Standalone output ===" && \
     ls -la /app/.next/standalone/ && \
     mkdir -p /app/.next/standalone-export && \
-    cp -r /app/.next/standalone/*/ /app/.next/standalone-export/ && \
-    ls -la /app/.next/standalone-export/
+    STANDALONE_DIR=$(find /app/.next/standalone -maxdepth 1 -mindepth 1 -type d | head -1) && \
+    echo "Copying from: $STANDALONE_DIR" && \
+    cp -r "$STANDALONE_DIR"/* /app/.next/standalone-export/ && \
+    ls -la /app/.next/standalone-export/ && \
+    test -f /app/.next/standalone-export/server.js && echo "✅ server.js found" || (echo "❌ server.js NOT FOUND" && exit 1)
 
 # ─── Stage 2: Production Runner ────────────────────────────────────────────
 FROM node:20-alpine AS runner
@@ -38,10 +41,10 @@ ENV HOSTNAME=0.0.0.0
 RUN addgroup --system --gid 1001 nodejs
 RUN adduser --system --uid 1001 nextjs
 
-# Copy flattened standalone output (server.js is now directly in /app)
+# Copy flattened standalone output (server.js directly in /app)
 COPY --from=builder --chown=nextjs:nodejs /app/.next/standalone-export/ ./
 
-# Copy static assets (images, fonts, etc.)
+# Copy static assets
 COPY --from=builder --chown=nextjs:nodejs /app/public ./public
 COPY --from=builder --chown=nextjs:nodejs /app/.next/static ./.next/static