Add note about python3.10 not being supported

closes #6041

docs/installation.md

@@ -56,6 +56,10 @@ OS Specific steps are listed first, the [Common](#common) section below is neces
 !!! Note
     Python3.7 or higher and the corresponding pip are assumed to be available.
 
+!!! Warning "Python 3.10 support"
+    Due to issues with dependencies, freqtrade is currently unable to support python 3.10.
+    We're working on supporting python 3.10, are however dependant on support from dependencies.
+
 === "Debian/Ubuntu"
     #### Install necessary dependencies
 

setup.sh

@@ -36,7 +36,8 @@ function check_installed_python() {
         fi
     done
 
-    echo "No usable python found. Please make sure to have python3.7 or newer installed"
+    echo "No usable python found. Please make sure to have python3.7 or newer installed."
+    echo "python3.10 is currently not supported."
     exit 1
 }
 
@@ -205,7 +206,7 @@ function config() {
 }
 
 function install() {
-    
+
     echo_block "Installing mandatory dependencies"
 
     if [ "$(uname -s)" == "Darwin" ]; then