add nix flake for dev env (#320)

Reviewed-on: https://codeberg.org/Codeberg/pages-server/pulls/320
Co-authored-by: crapStone <me@crapstone.dev>
Co-committed-by: crapStone <me@crapstone.dev>

flake.lock

@@ -0,0 +1,73 @@
+{
+  "nodes": {
+    "flake-utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1710146030,
+        "narHash": "sha256-SZ5L6eA7HJ/nmkzGG7/ISclqe6oZdOZTNoesiInkXPQ=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "b1d9ab70662946ef0850d488da1c9019f3a9752a",
+        "type": "github"
+      },
+      "original": {
+        "id": "flake-utils",
+        "type": "indirect"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1714030708,
+        "narHash": "sha256-JOGPOxa8N6ySzB7SQBsh0OVz+UXZriyahgvfNHMIY0Y=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "b0d52b31f7f4d80f8bf38f0253652125579c35ff",
+        "type": "github"
+      },
+      "original": {
+        "id": "nixpkgs",
+        "type": "indirect"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-utils": "flake-utils",
+        "nixpkgs": "nixpkgs",
+        "systems": "systems_2"
+      }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    },
+    "systems_2": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "id": "systems",
+        "type": "indirect"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -0,0 +1,26 @@
+{
+  outputs = {
+    self,
+    nixpkgs,
+    flake-utils,
+    systems,
+  }:
+    flake-utils.lib.eachSystem (import systems)
+    (system: let
+      pkgs = import nixpkgs {
+        inherit system;
+      };
+    in {
+      devShells.default = pkgs.mkShell {
+        buildInputs = with pkgs; [
+          gcc
+          go
+          gofumpt
+          gopls
+          gotools
+          go-tools
+          sqlite-interactive
+        ];
+      };
+    });
+}