chore: import upstream snapshot with attribution

examples/integrations/adk/entrypoint.sh

@@ -0,0 +1,43 @@
+#!/bin/bash
+set -e
+
+echo "========================================="
+echo "[entrypoint] Starting: Google ADK starter"
+echo "[entrypoint] Time: $(date -u)"
+echo "[entrypoint] PORT=${PORT:-not set}"
+echo "========================================="
+
+# Check critical env vars
+if [ -z "$GOOGLE_API_KEY" ]; then
+  echo "[entrypoint] WARNING: GOOGLE_API_KEY is not set! Agent will fail."
+else
+  echo "[entrypoint] GOOGLE_API_KEY: set (${#GOOGLE_API_KEY} chars)"
+fi
+
+# Start Python agent on port 8000 (override PORT which Railway sets to 3000)
+echo "[entrypoint] Starting ADK agent on port 8000..."
+cd /app/agent
+PORT=8000 python main.py 2>&1 | sed 's/^/[agent] /' &
+AGENT_PID=$!
+cd /app
+
+sleep 2
+
+if kill -0 $AGENT_PID 2>/dev/null; then
+  echo "[entrypoint] ADK agent started (PID: $AGENT_PID)"
+else
+  echo "[entrypoint] ERROR: ADK agent failed to start!"
+fi
+
+# Start Next.js frontend
+echo "[entrypoint] Starting Next.js on port ${PORT:-3000}..."
+PORT=${PORT:-3000} npx next start --port ${PORT:-3000} 2>&1 | sed 's/^/[nextjs] /' &
+NEXTJS_PID=$!
+
+echo "[entrypoint] Both processes running. Waiting..."
+
+wait -n $AGENT_PID $NEXTJS_PID
+EXIT_CODE=$?
+echo "[entrypoint] A process exited with code $EXIT_CODE"
+kill $AGENT_PID $NEXTJS_PID 2>/dev/null || true
+exit $EXIT_CODE