Automatically install coder in nix environments

install.sh

@@ -7,13 +7,17 @@ echo "PWD: $PWD"
 # Coder dotfiles (and most other ways of doing this) will not do a recursive clone, so do that in install script.
 git submodule init && git submodule update
 
+# Match case insensitively to make things easier for this part
+shopt -s nocasematch
+
 echo "Installing dotfiles..."
 if [ -f /etc/os-release ]; then
   echo "Idenitfying OS to install GNU stow..."
-  if grep -q -i debian /etc/os-release; then
-    echo "You've got Debian!";
+  if [ "${CODER_OS_FAMILY:-}" == "Ubuntu" ] || grep -q -i debian /etc/os-release; then
+    echo "Detected OS as Ubuntu, using apt";
     sudo apt-get update;
     sudo apt-get install -y stow;
+    installers/install-nix.sh
   elif grep -q -i rhel /etc/os-release || grep -q -i fedora /etc/os-release; then
     echo "You've got RedHat (or maybe Fedora)! Which is unsupported right now sorry!";
     # sudo yum install -y stow;
@@ -28,9 +32,13 @@ if [ -f /etc/os-release ]; then
     exit 1;
   fi;
 else
+  if [ "${CODER_TEMPLATE_TYPE}" == "Devcontainer" ]; then
+    installers/install-nix.sh
+  fi
   echo "ERROR: Unable to find '/etc/os-release' information!" 1>&2;
   exit 1;
 fi
+shopt -u nocasematch
 
 # Apply the dotfiles with stow
 echo "Running apply dotfiles"