Add README

README.md

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+## Preview
+
+### Edge Dark
+
+![edge-dark](https://paste.sainnhe.dev/XHEF.png)
+
+### Edge Light
+
+![edge-light](https://paste.sainnhe.dev/SYyp.png)
+
+### Everforest Dark
+
+![everforest-dark](https://paste.sainnhe.dev/mfmK.png)
+
+### Everforest Light
+
+![everforest-light](https://paste.sainnhe.dev/h7Y7.png)
+
+### Gruvbox Dark
+
+![gruvbox-dark](https://paste.sainnhe.dev/Fc6P.png)
+
+### Gruvbox Light
+
+![gruvbox-light](https://paste.sainnhe.dev/Tp6N.png)
+
+### Gruvbox Material Dark
+
+![gruvbox-material-dark](https://paste.sainnhe.dev/J4EW.png)
+
+### Gruvbox Material Light
+
+![gruvbox-material-light](https://paste.sainnhe.dev/cGnE.png)
+
+### Nord
+
+![nord](https://paste.sainnhe.dev/6pxH.png)
+
+### Soft Era
+
+![soft-era](https://paste.sainnhe.dev/WXrb.png)
+
+### Sonokai
+
+![sonokai](https://paste.sainnhe.dev/DYTA.png)
+
+### Sonokai Andromeda
+
+![sonokai-andromeda](https://paste.sainnhe.dev/prHH.png)
+
+### Sonokai Atlantis
+
+![sonokai-atlantis](https://paste.sainnhe.dev/Fx8d.png)
+
+### Sonokai Espresso
+
+![sonokai-espresso](https://paste.sainnhe.dev/nByy.png)
+
+### Sonokai Maia
+
+![sonokai-maia](https://paste.sainnhe.dev/KNWD.png)
+
+### Sonokai Shusia
+
+![sonokai-shusia](https://paste.sainnhe.dev/MSiH.png)
+
+## Introduction
+
+This is a port of some editor themes for Gitea (>= 1.18.0).
+
+List of available themes:
+
+- `edge-auto`
+- `edge-dark`
+- `edge-light`
+- `everforest-auto`
+- `everforest-dark`
+- `everforest-light`
+- `gruvbox-auto`
+- `gruvbox-dark`
+- `gruvbox-light`
+- `gruvbox-material-auto`
+- `gruvbox-material-dark`
+- `gruvbox-material-light`
+- `nord`
+- `soft-era`
+- `sonokai`
+- `sonokai-andromeda`
+- `sonokai-atlantis`
+- `sonokai-espresso`
+- `sonokai-maia`
+- `sonokai-shusia`
+
+Themes with `auto` postfix will automatically switch between light and dark variants based on system settings.
+
+## Installation
+
+Take `edge-dark` for example.
+
+### If Gitea is deployed via Docker
+
+First of all, find the `CustomPath` via this command:
+
+```bash
+sudo docker exec -u <run-user> <gitea-container-name> gitea help
+```
+
+Where `<run-user>` is the value of `RUN_USER` in your Gitea config, default to `git`;
+
+and `<gitea-container-name>` is the container name of your gitea instance that can be found via `docker ps`.
+
+Now execute the following command to install this theme:
+
+```bash
+sudo docker exec -u <run-user> <gitea-container-name> sh -c 'mkdir -p <custom-path> && curl --output-dir <custom-path> -LO https://git.sainnhe.dev/sainnhe/gitea-themes/raw/branch/master/dist/theme-edge-dark.css'
+```
+
+Replace `<custom-path>` with the `CustomPath` in this command.
+
+Then edit your Gitea config like this:
+
+```dosini
+[ui]
+DEFAULT_THEME = auto
+THEMES = auto,gitea,arc-green,edge-dark
+```
+
+Restart Gitea instance to apply change.
+
+### If Gitea is not deployed via Docker
+
+```bash
+mkdir -p <custom-path> && curl --output-dir <custom-path> -LO https://git.sainnhe.dev/sainnhe/gitea-themes/raw/branch/master/dist/theme-edge-dark.css
+```
+
+Where `<custom-path>` can be found via `gitea help`.
+
+Then edit your Gitea config like this:
+
+```dosini
+[ui]
+DEFAULT_THEME = auto
+THEMES = auto,gitea,arc-green,edge-dark
+```
+
+Restart Gitea instance to apply change.
+
+## Meta tag
+
+If you want to change the color of browser tabs / toolbar to match this theme, add `THEME_COLOR_META_TAG` to your config:
+
+```dosini
+[ui]
+DEFAULT_THEME = auto
+THEMES = auto,gitea,arc-green,edge-dark
+THEME_COLOR_META_TAG = `#333644`
+```
+
+List of meta tag colors of each theme (excluding `*-auto` themes):
+
+- `edge-dark`: `#333644`
+- `edge-light`: `#eef1f4`
+- `everforest-dark`: `#323c41`
+- `everforest-light`: `#f3efda`
+- `gruvbox-dark`: `#32302f`
+- `gruvbox-light`: `#f4e8be`
+- `gruvbox-material-dark`: `#32302f`
+- `gruvbox-material-light`: `#f4e8be`
+- `nord`: `#343b49`
+- `soft-era`: `#f4f0f0`
+- `sonokai`: `#33353f`
+- `sonokai-andromeda`: `#333648`
+- `sonokai-atlantis`: `#333846`
+- `sonokai-espresso`: `#393230`
+- `sonokai-maia`: `#313b42`
+- `sonokai-shusia`: `#37343a`
+
+## License
+
+[GPL 3](./LICENSE) © sainnhe