fix debian distro

app/docker.sh

@@ -1,5 +1,8 @@
 #!/usr/bin/env bash
 
+## Set environment
+distro=$(lsb_release -is | tr '[:upper:]' '[:lower:]')
+
 ## Remove old Docker version
 apt-get remove docker docker-engine docker.io containerd runc || true
 
@@ -9,12 +12,12 @@ apt-get install -y ca-certificates curl gnupg
 
 ## Create keyrings
 mkdir -m 0755 -p /etc/apt/keyrings
-curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpg
+curl -fsSL "https://download.docker.com/linux/${distro}/gpg" | sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpg
 chmod a+r /etc/apt/keyrings/docker.gpg
 
 ## Setup the repository
 echo \
-  "deb [arch="$(dpkg --print-architecture)" signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/ubuntu \
+  "deb [arch="$(dpkg --print-architecture)" signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/${distro} \
   "$(. /etc/os-release && echo "$VERSION_CODENAME")" stable" | \
   sudo tee /etc/apt/sources.list.d/docker.list > /dev/null