Add Gradle docker tasks for streamlined local development

[cbb330]

Summary

Adds new Gradle tasks to simplify the Docker-based local development workflow, replacing the manual multi-step process with a single command.

the OpenHouse build currently depends on shadowJars, which significantly slows builds (in CI and ELR so this time compounds) This dependency existed to simplify the local testing UX.As a first step toward removing shadowJars(which cuts the build time in half from ~5 minutes to ~2 minutes) I've added a one-line command to start the OpenHouse local server, effectively replacing the old shadowJars-based workflow.

Before (Manual Process)

# Step 1: Build all JARs, this task explicitly depends on shadowJars publish step
./gradlew build

# Step 2: Navigate to recipe directory
cd infra/recipes/docker-compose/oh-hadoop-spark

# Step 3: Build Docker images using the shadowjars in step1
docker compose build

# Step 4: Start containers
docker compose up -d

After (Single Command)

./gradlew dockerUp -Precipe=oh-hadoop-spark

New Gradle Tasks

Task	Description
dockerPrereqs	Builds all JAR files required by Docker images
dockerBuild	Builds Docker images after ensuring prerequisites
dockerUp	One-command build and start (JARs → images → containers)
dockerDown	Stop and remove containers

Usage

# Quick start with lightweight recipe
./gradlew dockerUp -Precipe=oh-only

# Full stack with Spark (default)
./gradlew dockerUp -Precipe=oh-hadoop-spark

# Stop containers
./gradlew dockerDown -Precipe=oh-only

Implementation Details

Explicit JAR Dependencies: The dockerPrereqs task declares all JAR dependencies explicitly, enabling proper Gradle parallelism:

• Service bootJars: tables, housetables, jobs
• Spark runtime uber JARs: spark-3.1, spark-3.5
• Spark apps uber JAR
• Utility JAR: dummytokens

Recipe Selection: Use -Precipe=<name> to select docker-compose recipe:

• oh-only - Lightweight, local filesystem (fastest startup)
• oh-hadoop - With HDFS
• oh-hadoop-spark - Full stack with Spark (default)

Design Decisions:

• Tasks are in separate docker group, NOT integrated into ./gradlew build
• Helpful output messages show service URLs and next steps
• Error handling for invalid recipe names

Documentation Updates

• README.md: Added quick start commands in "Running OpenHouse with Docker Compose"
• SETUP.md:
  • New "Quick Start (Recommended)" section at top
  • Task reference table
  • Restructured with "Manual Docker Compose (Advanced)" section for users who need fine-grained control

Test Plan

• Verified build works from clean state (no build/ directory)
• Verified docker tasks are NOT part of ./gradlew build (independent)
• Verified proper Gradle dependency resolution and parallelism (85 tasks, 66 executed in parallel)
• Verified services start and respond correctly:
  • Tables Service (8000): 200 OK - Create/Read/Delete table API tested
  • HouseTables Service (8001): 200 OK
  • Prometheus (9090): 200 OK
• Verified dockerDown properly stops and removes containers