feat: PostgreSQL image with TimescaleDB, VectorChord, pgvector

- Multi-stage Dockerfile for optimized image size (676MB vs 2GB)
- Support for PostgreSQL 15, 16, 17, 18
- TimescaleDB 2.24.0, VectorChord 1.0.0, pgvector 0.8.1
- Auto-creation of extensions on first startup
- CI/CD with tests for all versions
- OCI labels and healthcheck included

build.sh

@@ -0,0 +1,14 @@
+#!/bin/bash
+# Build script for TimescaleDB + VectorChord + pgvector
+
+PG_VERSION=${1:-18}
+IMAGE_NAME="timescaledb-vectorchord"
+
+echo "Building for PostgreSQL ${PG_VERSION}..."
+
+docker build \
+  --build-arg PG_VERSION=${PG_VERSION} \
+  -t ${IMAGE_NAME}:pg${PG_VERSION} \
+  .
+
+echo "Build complete: ${IMAGE_NAME}:pg${PG_VERSION}"