feat: add Docker configuration files for deployment and containerization

Dockerfile

@@ -0,0 +1,14 @@
+FROM oven/bun:1.3.4-alpine
+
+WORKDIR /app
+
+COPY package.json bun.lock ./
+RUN bun install --frozen-lockfile --production
+
+COPY tsconfig.json ./
+COPY src ./src
+
+ENV NODE_ENV=production
+ENV DATABASE_URL=file:/app/data/booster-role.sqlite
+
+CMD ["bun", "run", "src/index.ts"]