Update aiogram 3 template

Dockerfile

@@ -0,0 +1,19 @@
+FROM python:3.11-slim
+
+ENV PYTHONDONTWRITEBYTECODE=1 \
+    PYTHONUNBUFFERED=1 \
+    PIP_NO_CACHE_DIR=1
+
+WORKDIR /app
+
+RUN useradd --create-home --shell /usr/sbin/nologin bot
+
+COPY requirements.txt .
+RUN pip install -r requirements.txt
+
+COPY --chown=bot:bot . .
+RUN mkdir -p /app/tgbot/data && chown -R bot:bot /app
+
+USER bot
+
+CMD ["sh", "-c", "python migrate.py up && python main.py"]