Update Readme. Add Discord server. (#127)

* Update README text, add Discord server

* Change tables to divs because GitHub does not allow removing table borders

* Switch from tables to divs

* Try fixing the paragraph not centered on github

* Remove discord and cite titles, add new tab links

* Remove _blank target for links as it does not work on github. Remove unneeded div.

* Try styling pre

* Crop logo vertically, move discord banner

* Update style

* Update summary

* Update lighter summary

* Exclude emojis from links

Author: ibro45

README.md

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+
+<br/>
 <div align="center">
 <picture>
   <!-- old code that allows different pics for light/dark mode -->
@@ -9,50 +11,69 @@
 </picture>
 </div>
 <br/>
+<br/>
+<br/>
 <div align="center">
 
- [![build](https://github.com/project-lighter/lighter/actions/workflows/build.yml/badge.svg?branch=main)](https://github.com/project-lighter/lighter/actions/workflows/build.yml) ![Coverage](./assets/images/coverage.svg) [![GitHub license](https://img.shields.io/github/license/project-lighter/lighter)](https://github.com/project-lighter/lighter/blob/main/LICENSE)
+[![build](https://github.com/project-lighter/lighter/actions/workflows/build.yml/badge.svg?branch=main)](https://github.com/project-lighter/lighter/actions/workflows/build.yml) ![Coverage](./assets/images/coverage.svg) [![GitHub license](https://img.shields.io/github/license/project-lighter/lighter)](https://github.com/project-lighter/lighter/blob/main/LICENSE)
+
+<a href="https://discord.gg/zJcnp6KrUp">
+  <img src="https://discord.com/api/guilds/1252251284908539965/widget.png?style=banner2" alt="Lighter Discord Server"/>
+</a>
 </div>
 
 
-With `lighter`, focus on your deep learning experiments and forget about boilerplate through:
- 1. **Task-agnostic** training logic already implemented for you (classification, segmentation, self-supervised, etc.)
- 2. **Configuration-based** approach that will ensure that you can always reproduce your experiments and know what hyperparameters you used.
- 3. Extremely **simple integration of custom** models, datasets, transforms, or any other components to your experiments.
+&nbsp;
+
+
+Focus on your deep learning experiments and forget about (re)writing code. `lighter` is:
+ 1. **Task-agnostic**
+
+    Whether you’re working on classification, segmentation, or self-supervised learning, `lighter` provides generalized training logic that you can use out-of-the-box.
+
+ 2. **Configuration-based**
+
+    Easily define, track, and reproduce experiments with `lighter`’s configuration-driven approach, keeping all your hyperparameters organized.
+
+ 3. **Customizable**
+
+    Seamlessly integrate your custom models, datasets, or transformations into `lighter`’s flexible framework.
 
 &nbsp;
 
 `lighter` stands on the shoulder of these two giants:
  - [MONAI Bundle](https://docs.monai.io/en/stable/bundle_intro.html) - Configuration system. Similar to [Hydra](https://github.com/facebookresearch/hydra), but with additional features.
  - [PyTorch Lightning](https://github.com/Lightning-AI/lightning) - Our [`LighterSystem`](https://project-lighter.github.io/lighter/reference/system/) is based on the PyTorch Lightning [`LightningModule`](https://lightning.ai/docs/pytorch/stable/common/lightning_module.html) and implements all the necessary training logic for you. Couple it with the PyTorch Lightning [Trainer](https://lightning.ai/docs/pytorch/stable/common/trainer.html) and you're good to go.
- 
-Simply put, `lighter = config(trainer + system)` 😇
-
 
-## 📖 Usage
-
-- [📚 Documentation](https://project-lighter.github.io/lighter/)
-- [🎥 YouTube Channel](https://www.youtube.com/channel/UCef1oTpv2QEBrD2pZtrdk1Q)
-
-## 🚀 Install
+<br/>
+<div align="center">Simply put, <code>lighter = config(trainer + system)</code>  😇</div>
+<br/>
 
-Current release:
-```bash
-pip install project-lighter
-```
+## 📖 Getting Started
+<div align="center">
+<p style="text-align: center;">
+  📚 <a href="https://project-lighter.github.io/lighter/"> Documentation</a>&nbsp;&nbsp;&nbsp;
+  🎥 <a href="https://www.youtube.com/channel/UCef1oTpv2QEBrD2pZtrdk1Q">YouTube Channel</a>&nbsp;&nbsp;&nbsp;
+  👾 <a href="https://discord.gg/zJcnp6KrUp">Discord Server</a>
+</p>
+</div>
 
-Pre-release (up-to-date with the main branch):
-```bash
-pip install project-lighter --pre
-```
+<b>Install:</b>
+<pre><code>pip install project-lighter</code></pre>
+<details>
+<summary><b>Pre-release (up-to-date with the main branch):</b></summary>
+<pre><code>pip install project-lighter --pre</code></pre>
+</details>
 
-For development:
-```bash
-make setup
+<details>
+<summary><b>For development:</b></summary>
+<pre><code>make setup
 make install             # Install lighter via Poetry
 make pre-commit-install  # Set up the pre-commit hook for code formatting
-poetry shell             # Once installed, activate the poetry shell
-```
+poetry shell             # Once installed, activate the poetry shell</code></pre>
+</details>
+<br/>
+
 
 ## 💡 Projects
 Projects that use `lighter`:
@@ -61,22 +82,17 @@ Projects that use `lighter`:
 | --- | --- |
 | [Foundation Models for Quantitative Imaging Biomarker Discovery in Cancer Imaging](https://aim.hms.harvard.edu/foundation-cancer-image-biomarker) | A foundation model for lesions on CT scans that can be applied to down-stream tasks related to tumor radiomics, nodule classification, etc. |
 
+<br/>
 
-## 📄 Cite:
-
-If you find `lighter` useful in your research or project, please consider citing it:
-
-```bibtex
-@software{lighter,
-  author       = {Ibrahim Hadzic and
-                  Suraj Pai and
-                  Keno Bressem and
-                  Hugo Aerts},
-  title        = {Lighter},
-  publisher    = {Zenodo},
-  doi          = {10.5281/zenodo.8007711},
-  url          = {https://doi.org/10.5281/zenodo.8007711}
-}
-```
-
-We appreciate your support!
+## Cite
+<pre><code>@software{lighter,
+author       = {Ibrahim Hadzic and
+                Suraj Pai and
+                Keno Bressem and
+                Hugo Aerts},
+title        = {Lighter},
+publisher    = {Zenodo},
+doi          = {10.5281/zenodo.8007711},
+url          = {https://doi.org/10.5281/zenodo.8007711}
+}</code></pre>
+</div>