feat: checking linux kernel version when installing amneziawg-go (#2098)

* Checking Linux kernel version when installing amneziawg-go

print the Linux kernel version to stdOut for subsequent checking by the server controller.

* Add error for old linux kernel

Add error 214 ServerLinuxKernelTooOld

* Add case for old linux kernel

Add case for error 214 ServerLinuxKernelTooOld

* Added kernel check for Awg2

Added Linux kernel version check and introduced corresponding ServerLinuxKernelTooOld error for Awg2.

client/server_scripts/install_docker.sh

@@ -21,4 +21,5 @@ if [ "$(systemctl is-active docker)" != "active" ]; then \
   sleep 5; sudo systemctl start docker; sleep 5;\
 fi;\
 if ! command -v sudo > /dev/null 2>&1; then echo "Failed to install sudo, command not found"; exit 1; fi;\
-docker --version
+docker --version;\
+uname -sr