diff --git a/book/Miscellaneous/Chapter.ipynb b/book/Miscellaneous/Chapter.ipynb
index a6df1db..b17afdb 100644
--- a/book/Miscellaneous/Chapter.ipynb
+++ b/book/Miscellaneous/Chapter.ipynb
@@ -117,6 +117,37 @@
     "\n",
     "It makes your life easier by enforcing writing descriptive commits."
    ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Docker Best Practice: Use `.dockerignore`"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "One Docker Tip:\n",
+    "\n",
+    "Use a `.dockerignore` file to avoid adding unnecessary files to the image.\n",
+    "\n",
+    "This will definitely reduce your Docker image size, but also more safe."
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# .dockerignore\n",
+    ".git\n",
+    ".cache\n",
+    "*.md\n",
+    "!README*.md\n",
+    "README-secret.md\n",
+    ".env"
+   ]
   }
  ],
  "metadata": {