add source code and readme

build/postgresql-postgis/build.sh

@@ -0,0 +1,41 @@
+#!/bin/bash
+set -e
+
+# Build script for ARM64 PostGIS image compatible with CloudNativePG
+
+REGISTRY="<YOUR_REGISTRY_URL>/library"
+IMAGE_NAME="cnpg-postgis"
+TAG="16.6-3.4-v2"
+FULL_IMAGE="${REGISTRY}/${IMAGE_NAME}:${TAG}"
+LOCAL_IMAGE="${IMAGE_NAME}:${TAG}"
+
+echo "Building ARM64 PostGIS image: ${FULL_IMAGE}"
+
+# Build the image
+docker build \
+    --platform linux/arm64 \
+    -t "${FULL_IMAGE}" \
+    .
+
+echo "Image built successfully: ${FULL_IMAGE}"
+
+# Test the image by running a container and checking PostGIS availability
+echo "Testing PostGIS installation..."
+docker run --rm --platform linux/arm64 "${FULL_IMAGE}" \
+    postgres --version
+
+echo "Tagging image for local testing..."
+docker tag "${FULL_IMAGE}" "${LOCAL_IMAGE}"
+
+echo "Image built and tagged as:"
+echo "  Harbor registry: ${FULL_IMAGE}"
+echo "  Local testing: ${LOCAL_IMAGE}"
+
+echo ""
+echo "To push to Harbor registry (when ready for deployment):"
+echo "  docker push ${FULL_IMAGE}"
+
+echo ""
+echo "Build completed successfully!"
+echo "Local testing image: ${LOCAL_IMAGE}"
+echo "Harbor registry image: ${FULL_IMAGE}"