flake: added template for elixir

flake.nix

@@ -27,6 +27,12 @@
             inherit pkgs craneLib;
           };
         };
+        templates = {
+          elixir-devshell = {
+            description = " A basic developer shell for elixir";
+            path = ./templates/devshells/elixir;
+          };
+        };
 
         apps = {
           jellyfin-tui = {

templates/devshells/elixir/flake.nix

@@ -0,0 +1,28 @@
+{
+  description = "Elixir devshel";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs";
+    flake-utils.url = "github:numtide/flake-utils";
+  };
+
+  outputs =
+    {
+      self,
+      nixpkgs,
+      flake-utils,
+    }:
+    flake-utils.lib.eachDefaultSystem (
+      system:
+      let
+        pkgs = import nixpkgs { inherit system; };
+      in
+      {
+        devShells.default =
+          with pkgs;
+          mkShell {
+            packages = [ beam.packages.erlang_26.elixir_1_15 ];
+          };
+      }
+    );
+}