added shell.nix for dependecies

README.md

@@ -16,3 +16,18 @@ For this 'pull method' to work I needed to add the following line to the servers
 %sudo  ALL=(ALL) NOPASSWD: /usr/lib/openssh/sftp-server
 ```
 
+*Notice:*
+
+The server file system will be mounted at `tmp/mnt/ag-link-server` on your local machine. Define the paths to be backed up from there on.
+
+
+## Dependencies
+
+Backup depends on:
+
+- `borgbackup`
+- `borgmatic`
+- `sshfs`
+
+If you have nix installed, simply run `nix-shell` from this Repository.
+

shell.nix

@@ -0,0 +1,9 @@
+with import <nixpkgs> {};
+
+mkShell {
+  name = "Dependencies for Server Backup";
+  buildInputs = [borgbackup borgmatic sshfs];
+  shellHook = ''
+    echo "Good luck backing up!"
+  '';  
+}