Add documentation, and update code that injects key bindings to also inject it into the docs

README.md

@@ -122,6 +122,8 @@ I can totally see the usefulness of such a feature, and it's definitely somethin
 
 ### What are the default keyboard shortcuts?
 
+<!-- keyboard_shortcuts -->
+
 **On Mac**
 
 ```

docs/index.md

@@ -0,0 +1,89 @@
+# Heynote Documentation
+
+Heynote is a dedicated scratchpad for developers. It functions as a large persistent text buffer where you can write down anything you like. Works great for that Slack message you don't want to accidentally send, a JSON response from an API you're working with, notes from a meeting, your daily to-do list, etc. 
+
+The Heynote buffer is divided into blocks, and each block can have its own Language set (e.g. JavaScript, JSON, Markdown, etc.). This gives you syntax highlighting and lets you auto-format that JSON response.
+
+## Default Key Bindings
+
+<!-- keyboard_shortcuts -->
+
+**On Mac**
+
+```
+⌘ + Enter           Add new block below the current block
+⌥ + Enter           Add new block before the current block
+⌘ + Shift + Enter   Add new block at the end of the buffer
+⌥ + Shift + Enter   Add new block at the start of the buffer
+⌘ + ⌥ + Enter       Split the current block at cursor position
+⌘ + L               Change block language
+⌘ + Down            Goto next block
+⌘ + Up              Goto previous block
+⌘ + A               Select all text in a note block. Press again to select the whole buffer
+⌘ + ⌥ + Up/Down     Add additional cursor above/below
+⌥ + Shift + F       Format block content (works for JSON, JavaScript, HTML, CSS and Markdown)
+```
+
+**On Windows and Linux**
+
+```
+Ctrl + Enter           Add new block below the current block
+Alt + Enter            Add new block before the current block
+Ctrl + Shift + Enter   Add new block at the end of the buffer
+Alt + Shift + Enter    Add new block at the start of the buffer
+Ctrl + Alt + Enter     Split the current block at cursor position
+Ctrl + L               Change block language
+Ctrl + Down            Goto next block
+Ctrl + Up              Goto previous block
+Ctrl + A               Select all text in a note block. Press again to select the whole buffer
+Ctrl + Alt + Up/Down   Add additional cursor above/below
+Alt + Shift + F        Format block content (works for JSON, JavaScript, HTML, CSS and Markdown)
+Alt                    Show menu
+```
+
+## Download/Installation
+
+Download the appropriate (Mac, Windows or Linux) version from [heynote.com](https://heynote.com). The Windows build is not signed, so you might see some scary warning (I can not justify paying a yearly fee for a certificate just to get rid of that).
+
+### Notes on Linux installation
+
+It's been reported [(#48)](https://github.com/heyman/heynote/issues/48) that ChromeOS's Debian VM need the following packages installed to run the Heynote AppImage:
+
+```
+libfuse2
+libnss3
+libnspr4
+```
+
+## Math Blocks
+
+Heynote's Math blocks are powered by [Math.js expressions](https://mathjs.org/docs/expressions). Checkout their [documentation](https://mathjs.org/docs/) to see what [syntax](https://mathjs.org/docs/expressions/syntax.html), [functions](https://mathjs.org/docs/reference/functions.html), and [constants](https://mathjs.org/docs/reference/constants.html) are available.
+
+### Accessing the previous result
+
+The variable `prev` can be used to access the previous result. For example:
+
+```
+128
+prev * 2 # 256
+```
+
+### Changing how the results of Math blocks are formatted
+
+You can define a custom `format` function within the Math block like this:
+
+```
+_format = format # store reference to the built in format
+format(x) = _format(x, {notation:"exponential"})
+```
+
+See the [Math.js format()](https://mathjs.org/docs/reference/functions/format.html) function for more info on what's supported.
+
+## The buffer file
+
+The default paths for the buffer data for the respective operating systems are:
+
+-   Mac: `~/Library/Application Support/Heynote/buffer.txt`
+-   Windows: `%APPDATA%\Heynote\buffer.txt`
+-   Linux: `~/.config/Heynote/buffer.txt`
+

vite.config.mjs

@@ -20,7 +20,7 @@ const isProduction = process.env.NODE_ENV === "production"
 const updateReadmeKeybinds = async () => {
 	const readmePath = path.resolve(__dirname, 'README.md')
 	let readme = fs.readFileSync(readmePath, 'utf-8')
-	const keybindsRegex = /^(### What are the default keyboard shortcuts\?\s*).*?^(```\s+#)/gms
+	const keybindsRegex = /^(<!-- keyboard_shortcuts -->\s*).*?^(```\s+#)/gms
 	const shortcuts = `$1**On Mac**
 
 \`\`\`
@@ -34,6 +34,11 @@ ${keyHelpStr('win32')}
 $2`
 	readme = readme.replace(keybindsRegex, shortcuts)
 	fs.writeFileSync(readmePath, readme)
+
+	const docsPath = path.resolve(__dirname, 'docs', 'index.md')
+	let docs = fs.readFileSync(docsPath, 'utf-8')
+	docs = docs.replace(keybindsRegex, shortcuts)
+	fs.writeFileSync(docsPath, docs)
 }
 
 const updateGuesslangLanguagesInWebWorker = async () => {