fix(docker): fix supersync container startup issues

- Fix Dockerfile.test: use correct path dist/src/index.js (not dist/index.js)
  since TypeScript compiles with rootDir="." preserving src/ directory
- Fix healthcheck: use 127.0.0.1 instead of localhost to avoid IPv6
  resolution issues (wget resolves localhost to ::1 but server listens on IPv4)

docker-compose.yaml

@@ -50,7 +50,7 @@ services:
           '--quiet',
           '--tries=1',
           '--spider',
-          'http://localhost:1900/health',
+          'http://127.0.0.1:1900/health',
         ]
       interval: 5s
       timeout: 5s

packages/super-sync-server/Dockerfile.test

@@ -50,4 +50,4 @@ ENV CORS_ORIGINS=*
 ENV JWT_SECRET=e2e-test-secret-minimum-32-chars-long-for-security
 
 # Push schema to DB and start server
-CMD sh -c "npx prisma db push && node dist/index.js"
+CMD sh -c "npx prisma db push && node dist/src/index.js"