Add Docker deployment support with compose, entrypoint and docs

- Add Dockerfile (pre-built binary) and Dockerfile.source
- Add docker-compose.yml, docker-compose.prod.yml, docker-compose.override.yml
- Add docker-entrypoint.sh with non-root user support
- Add .dockerignore and helper scripts (scripts/docker-build.sh, scripts/docker-run.sh)
- Add docs/en/docker.md with full Docker guide
- Update docs/en/deployment.md and README.md
- Fix src/barabadb/core/config.nim to read BARADB_ADDRESS, BARADB_PORT, BARADB_DATA_DIR from env
- Fix src/barabadb/core/httpserver.nim missing wire import

scripts/docker-run.sh

@@ -0,0 +1,46 @@
+#!/bin/bash
+set -e
+
+# BaraDB Docker Run Script
+# Улеснява стартирането на BaraDB контейнер с правилни настройки
+
+IMAGE_NAME="${IMAGE_NAME:-baradb:latest}"
+CONTAINER_NAME="${CONTAINER_NAME:-baradb}"
+DATA_DIR="${DATA_DIR:-$(pwd)/data/docker}"
+
+echo "=== Starting BaraDB Container ==="
+echo "Image: ${IMAGE_NAME}"
+echo "Container: ${CONTAINER_NAME}"
+echo "Data directory: ${DATA_DIR}"
+echo ""
+
+# Създаваме локална data директория ако не съществува
+mkdir -p "${DATA_DIR}"
+
+docker run -d \
+  --name "${CONTAINER_NAME}" \
+  --hostname baradb \
+  --restart unless-stopped \
+  -p 9472:9472 \
+  -p 9912:9912 \
+  -p 9913:9913 \
+  -v "${DATA_DIR}:/data" \
+  -e BARADB_ADDRESS=0.0.0.0 \
+  -e BARADB_PORT=9472 \
+  -e BARADB_DATA_DIR=/data \
+  -e BARADB_LOG_LEVEL=info \
+  --health-cmd "wget -q --spider http://localhost:9470/health || exit 1" \
+  --health-interval 15s \
+  --health-timeout 5s \
+  --health-retries 3 \
+  "${IMAGE_NAME}"
+
+echo ""
+echo "=== Container Started ==="
+echo "Logs: docker logs -f ${CONTAINER_NAME}"
+echo "Stop: docker stop ${CONTAINER_NAME}"
+echo ""
+echo "API Endpoints:"
+echo "  Binary Protocol: localhost:9472"
+echo "  HTTP/REST:       http://localhost:9912"
+echo "  WebSocket:       ws://localhost:9913"