PHOENIX-7868 : Docker setup for phoenix-adapters

[palashc]

Provides a self-contained Docker stack so contributors can spin up the full dependency tree (Hadoop, ZooKeeper, HBase, Phoenix) and the phoenix-adapters REST server with one command, plus a smoke-test script that validates CRUD and Streams DynamoDB API against it.

# 1. Bring up the full stack at the versions pinned in pom.xml and BLOCK
#    until every container reports healthy (REST is ~30-60s on cold start).
#    First time: ~8-12 min total; subsequent runs are cached.

docker compose -f docker/docker-compose.yml up -d --build --wait

# 2. Validate it works end-to-end (CRUD + UpdateItem + BatchWriteItem + streams).
bash docker/scripts/smoke.sh

# -> "Result: 20 checks PASSED across 18 API calls"

# 3. Use it. The DynamoDB-compatible endpoint is at http://localhost:8842 .
#    Point any AWS SDK at it, or hit it directly:

curl -s -X POST http://localhost:8842/ \
    -H 'Content-Type: application/x-amz-json-1.0' \
    -H 'X-Amz-Target: DynamoDB_20120810.ListTables' -d '{}'

# 4. Tear down when you're done.

docker compose -f docker/docker-compose.yml down -v

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