docs: improve the clarity of the discord invite link
Easy to use, easy to deploy, easy to debug.
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<p>
- <a href="https://discord.gg/2jfycwXVM3"><img src="https://img.shields.io/discord/562694099887587338?color=5865F2&logo=discord&logoColor=white" alt="Discord server" /></a>
+ Join our Discord server: <a href="https://discord.gg/2jfycwXVM3"><img src="https://img.shields.io/discord/562694099887587338?color=5865F2&logo=discord&logoColor=white" alt="Discord server" /></a>
</p>
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