Docs. Adding documentation about the new nix build deploy action

Signed-off-by: Eoghan Conlon <eoghanconlon73@skynet.ie>

README.md

@@ -106,8 +106,7 @@ jobs:
 ```
 
 ## Docker Nix
-This action is used to get nix into the docker user deploy system. For this to work, replace the curly brackets with your
-desired Nix version.
+This action is used to get nix into the docker user deploy system.
 ### v7
 ```yaml
 jobs:
@@ -115,6 +114,15 @@ jobs:
     runs-on: docker
     steps:
       uses: https://forgejo.skynet.ie/Skynet/actions/docker_nix@v7
-      with:
-        nix_version: {insert_nix_version_here}
+```
+
+## Nix build Deploy user
+This action can build your website if you develop it using different methods than writing HTML. Only pre-requisite is that
+this action uses the Nix build command, so your repository requires a nix flake. 
+```yaml
+jobs:
+  build:
+    runs-on: docker
+      steps:
+        uses: https://forgejo.skynet.ie/Skynet/actions/nix-build_deploy@v7
 ```

docker_nix/action.yml

@@ -1,10 +1,5 @@
 name: 'Get image ready to run nix jobs'
 description: 'Update apt repositories and installing sudo'
-inputs:
-  nix_path:
-    description: 'Nix channel to be followed'
-    required: false
-    default: 'nixpkgs=channel:nixos-unstable'
 runs:
   using: 'composite'
   steps: