script to set up postgres docker

packages/backend/setup-docker-postgres

@@ -0,0 +1,33 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+CONTAINER_NAME="${CONTAINER_NAME:-sprint-postgres}"
+POSTGRES_IMAGE="${POSTGRES_IMAGE:-postgres:16-alpine}"
+POSTGRES_USER="${POSTGRES_USER:-eussi}"
+POSTGRES_PASSWORD="${POSTGRES_PASSWORD:-password}"
+POSTGRES_DB="${POSTGRES_DB:-issue}"
+POSTGRES_PORT="${POSTGRES_PORT:-5432}"
+
+if ! command -v docker >/dev/null 2>&1; then
+  echo "docker is required but not installed."
+  exit 1
+fi
+
+if docker ps -a --filter "name=^/${CONTAINER_NAME}$" --format '{{.Names}}' | grep -q "^${CONTAINER_NAME}$"; then
+  docker update --restart unless-stopped "${CONTAINER_NAME}" >/dev/null
+  docker start "${CONTAINER_NAME}" >/dev/null || true
+  echo "container '${CONTAINER_NAME}' already exists and is running (or starting)."
+else
+  docker run -d \
+    --name "${CONTAINER_NAME}" \
+    --restart unless-stopped \
+    -e "POSTGRES_USER=${POSTGRES_USER}" \
+    -e "POSTGRES_PASSWORD=${POSTGRES_PASSWORD}" \
+    -e "POSTGRES_DB=${POSTGRES_DB}" \
+    -p "${POSTGRES_PORT}:5432" \
+    "${POSTGRES_IMAGE}" >/dev/null
+  echo "container '${CONTAINER_NAME}' created and started."
+fi
+
+echo "connection string: postgres://${POSTGRES_USER}:${POSTGRES_PASSWORD}@localhost:${POSTGRES_PORT}/${POSTGRES_DB}"