Initialize //blog with lorri

To create new posts, I run...
```shell
hugo new name-of-post.md
```

While writing posts, I run...
```shell
hugo serve -D
```

I need hugo available on PATH environment variable, which lorri provides.

2 files changed, 10 insertions, 0 deletions

diff --git a/blog/.envrc b/blog/.envrc
new file mode 100644
index 000000000000..b80e28b4b815
--- /dev/null
+++ b/blog/.envrc
@@ -0,0 +1,2 @@
+source_up
+eval "$(lorri direnv)"
diff --git a/blog/shell.nix b/blog/shell.nix
new file mode 100644
index 000000000000..d1b4f49942bc
--- /dev/null
+++ b/blog/shell.nix
@@ -0,0 +1,8 @@
+let
+  pkgs = import <nixpkgs> {};
+in
+pkgs.mkShell {
+  buildInputs = with pkgs; [
+    hugo
+  ];
+}