feat(build): add Docker support (#322)

* feat(build): add Docker support

* fix: pnpm patches

* chore: update readme

* chore: refactor Docker section into separate markdown file

* chore: remove polling and host 0.0.0.0

* feat: add .dockerignore

* feat: update .dockerignore

DOCKER_DEV_SETUP.md

@@ -0,0 +1,89 @@
+# Docker Dev Setup
+
+## Prerequisites
+
+-   Docker installed on your machine
+-   Git (to clone the repository)
+
+## Getting Started
+
+1. Clone the repository:
+
+    ```
+    git clone https://github.com/Longhorn-Developers/UT-Registration-Plus.git
+    cd UT-Registration-Plus
+    ```
+
+2. Build the Docker image:
+
+    ```
+    docker build -t ut-registration-plus .
+    ```
+
+## Using Docker for Different Modes
+
+The Docker setup supports three modes of operation: build, zip, and dev. You can choose the mode either by passing it as a command or by setting the `BUILD_MODE` environment variable.
+
+### Build Mode (Default)
+
+This mode builds the extension and places the output in the `dist` folder.
+
+```
+docker run -it --rm -v $(pwd)/dist:/extension/dist ut-registration-plus build
+```
+
+or
+
+```
+docker run -it --rm -v $(pwd)/dist:/extension/dist -e BUILD_MODE=build ut-registration-plus
+```
+
+### Zip Mode
+
+This mode builds the extension and creates a zipped package in the `package` folder.
+
+```
+docker run -it --rm -v $(pwd)/package:/extension/package ut-registration-plus zip
+```
+
+or
+
+```
+docker run -it --rm -v $(pwd)/package:/extension/package -e BUILD_MODE=zip ut-registration-plus
+```
+
+### Development Mode with Hot Module Replacement (HMR)
+
+This mode runs the extension in development mode with HMR support.
+
+_Note_: This currently doesn't work.
+
+```
+docker run -it --rm -v $(pwd)/dist:/extension/dist -v $(pwd)/dist:/extension/dist -p 5173:5173 ut-registration-plus dev
+```
+
+or
+
+```
+docker run -it --rm -v $(pwd)/dist:/extension/dist -p 5173:5173 -e BUILD_MODE=dev ut-registration-plus
+```
+
+## Accessing the Built Extension
+
+-   For build mode, the extension files will be in the `dist` directory on your host machine.
+-   For zip mode, the zipped extension will be in the `package` directory on your host machine.
+-   For dev mode, the extension will be continuously built in the `dist` directory, and you can load it as an unpacked extension in Chrome.
+
+## Docker Development Workflow
+
+When working on the extension:
+
+1. Run the container in dev mode
+2. Make changes to your source code
+3. The extension will automatically rebuild thanks to HMR
+4. Reload the extension in Chrome to see your changes
+
+## Troubleshooting
+
+-   If you encounter permission issues with the output directories, ensure that the directories exist on your host machine and have the correct permissions.
+-   For any other issues, please check the Docker logs or open an issue in the GitHub repository.