feat: add flake

.gitignore

@@ -0,0 +1,18 @@
+.DS_Store
+node_modules
+/dist
+
+# dotenv environment variables file
+.env
+.env.*
+!.env.example
+
+# direnv
+.direnv/
+.envrc
+
+# nix
+/result
+
+# Log files
+npm-debug.log*

flake.lock

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+{
+  "nodes": {
+    "flake-utils": {
+      "locked": {
+        "lastModified": 1656928814,
+        "narHash": "sha256-RIFfgBuKz6Hp89yRr7+NR5tzIAbn52h8vT6vXkYjZoM=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "7e2a3b3dfd9af950a856d66b0a7d01e3c18aa249",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1659219666,
+        "narHash": "sha256-pzYr5fokQPHv7CmUXioOhhzDy/XyWOIXP4LZvv/T7Mk=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "7b9be38c7250b22d829ab6effdee90d5e40c6e5c",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-utils": "flake-utils",
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

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+{
+  inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+
+  inputs.flake-utils.url = "github:numtide/flake-utils";
+
+  outputs = { self, nixpkgs, flake-utils }:
+    flake-utils.lib.eachDefaultSystem (system:
+      let pkgs = import nixpkgs { inherit system; };
+      in rec {
+        devShells = {
+          default = pkgs.mkShell {
+            name = "env";
+            buildInputs = with pkgs; [
+              nodejs-16_x
+
+              # linters & formatters
+              nixfmt
+              nodePackages.prettier
+
+              # language servers
+              nodePackages.bash-language-server
+              nodePackages.typescript-language-server
+              nodePackages.vscode-langservers-extracted
+            ];
+
+            shellHook = ''
+              export PATH="$PWD/node_modules/.bin:$PATH"
+            '';
+          };
+        };
+      });
+}