feat: 🎸 add images

Author: panicdragon

README.md

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+# NES Architecture Book
+
+## Development
+
+```
+cargo install mdbook
+```
+
+## Build and Preview Methods
+
+Execute the following command in the root directory where book.toml is located (where the src directory usually resides)
+
+```
+mdbook serve
+```
+Local server starts up.
+
+```
+http://localhost:3000
+```
+
+Optionally specify port
+
+```
+mdbook serve -p 4000
+```

src/assets/images/image_1.png

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+![image_1.png](assets/images/image_1.png)
+
+![image_2.png](assets/images/image_2.png)