add discord-instructions

Author: AFink

docs/installation/discord.gif

@@ -0,0 +1,11 @@
+![Demonstration GIF](discord.gif)
+
+1. Create a new [Application](https://discord.com/developers/applications) at the [Discord Developer Portal](https://discord.com/developers/).
+
+2. Go to "Bot" at the sidebar and click on "Add Bot".
+
+3. In the section "token" click on "copy" to copy the token.
+
+4. Paste the token with ++ctrl+v++ into the sinusbot-instance-creation form.
+
+5. (Optional: Add the bot to your discord-server by creating a OAuth2-link by visiting the page "OAuth2" in the Discord-Developers-sidebar and selecting scope "bot". Open then the provided URL in your browser.)

docs/installation/discord.md

@@ -15,6 +15,7 @@ nav:
       - 'NGINX': 'reverse-proxy/nginx.md'
       - 'Apache 2': 'reverse-proxy/apache2.md'
       - 'Common Adaptations': 'reverse-proxy/common-adaptations.md'
+    - 'Discord': 'installation/discord.md'
     - 'Increase TS Security Level': 'installation/increase-security-level.md'
   - 'FAQ':
     - 'General': 'faq/general.md'