Add CONTRIBUTING.md and update bobatheme

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 *.css linguist-detectable=true
 *.js linguist-detectable=true
 README.md linguist-detectable=false
+CONTRIBUTING.md linguist-detectable=false
 docs/** linguist-detectable=false

CONTRIBUTING.md

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+# Contributing to bobatheme
+
+## Where to put stuff
+
+### Discussions
+
+The best place to ask questions or have discussions is the (relatively new)
+discussions feature on GitHub, available
+[here](https://github.com/BBaoVanC/bbaovanc.com/discussions). It's not too big
+of an issue though because discussions and issues can easily be converted
+between eachother.
+
+### Issues
+
+Issues should be used only for, well, issues. Ignore all the placeholder ones
+prefixed with "Translate:" and tagged with the "translation" tag as they are
+placeholders used in the projects tab. I might mark them as closed in the future
+to clean it up but I'll worry about that later.
+
+## Translations
+
+Discussion relating to translations should either go as comments or reviews on
+the pull request adding the translation, or as a discussion under the
+[Translations category](https://github.com/BBaoVanC/bbaovanc.com/discussions/categories/translations).
+
+## Pull requests
+
+### Commit messages
+
+It's not too big of a deal what you put in your commit messages, but try to give
+each commit a rough description of what it changes. I'll use squash merges most
+of the time anyways.
+
+### Description
+
+If the pull request doesn't require any extra information in addition to the
+title, you can probably leave the description blank. Otherwise you can put some
+information, just try to keep it concise; it's better to read a couple sentences
+than an entire essay with the same amount of information.
+
+## Building
+
+## Automatic deploy previews with Netlify
+
+Netlify will automatically build each pull request into a public deploy preview,
+and will link it in a comment.
+
+## Manual (local) building
+
+You can also build the site yourself using Hugo, including a live local preview.
+
+1. Make sure you install the latest version of Hugo, or at least the
+   `min_version` listed in
+   [theme.toml](https://github.com/BBaoVanC/bobatheme/blob/master/theme.toml#L11).
+2. Clone the repo
+3. Make sure to download and checkout the submodules (use `git submodule update
+   --init --recursive`). The `--recursive` flag is especially important because
+   bobatheme has a submodule in itself for icons.
+4. Run `hugo serve -D` to run a local webserver. Hugo will show the URL you can
+   access the preview at. It will automatically rebuild and reload pages when
+   you save them.