Refine Docker Compose setup for Wave Lite

[munishchouhan]

Summary

• Right-sized system requirements from 32 GB / 8 CPU (m5a.2xlarge) down to 12 GB / 4 CPU (m5a.xlarge) — Wave Lite disables build, mirror, scan, and blob cache services, and k8s runs at 1.4 GB / 0.2 CPU per pod, so the previous requirements were massively oversized.
• Right-sized container resource limits — set 4 GB memory / 1 CPU limit and 2 GB memory / 0.2 CPU reservation per replica, aligned with actual k8s production usage rather than the previous 4 GB / 1 CPU reservations. - Overhauled lite/docker-compose.yml — added bundled PostgreSQL 16 and Redis 7 services with health checks, depends_on conditions, resource limits, and restart policies. Previously the compose file assumed external DB/Redis but provided no guidance, making first-time setup impossible out of the box.
• Added lite/wave.env template — centralizes connection settings (DB, Redis, Platform endpoint, mail) in one documented env file instead of scattering them across the YAML config.
• Simplified docs/install/docker-compose.md — removed disabled-service blocks and stale settings (removed stream-pool event loop group, duplicate connection strings) from the example config. Moved DB/Redis/Platform settings to the env file to reduce copy-paste errors.
• Updated lite/config.yml to explicitly disable build, mirror, scan, and blobCache — these were previously only implied by the lite Micronaut profile but not visible in the config, causing confusion about what was running. - Added managed-services note — steers production users toward managed PostgreSQL/Redis (RDS, ElastiCache) while keeping containerized option for development.
• Switched deployment to Docker Swarm — docs now use docker stack deploy with 2 replicas, since plain docker compose up cannot run replicas with port
  bindings.