Update Readme, add solder instructions

solder_instructions.md

@@ -39,8 +39,7 @@ What is...
 
 
 
-⚠️  The silkscreen of the RGB-LED is on the <u>wrong</u> side of the PCB! Solder it on the other side.
-{: .alert .alert-info}
+<p class="alert alert-info">⚠️  The silkscreen of the RGB-LED is on the <u>wrong</u> side of the PCB! Solder it on the other side! Check instructions below!</p>
 
 ## Before soldering