Set up nix shell for dev env. Add husky git hooks to run gts check before git commit. Clean up source code files and remove any types.

.envrc

@@ -0,0 +1 @@
+use flake

.github/workflows/test.yml

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+name: 'Test'
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+jobs:
+  test:
+    name: 'Test'
+    runs-on: ubuntu-latest
+    steps:
+      - name: 'Check out code'
+        uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+      - name: 'Install nodejs 20'
+        uses: actions/setup-node@v2
+        with:
+          node-version: '20'
+      - name: 'Build and test'
+        run: |
+          npm install
+          npm run lint
+          npm run compile
+          npm run compile-web

.gitignore

@@ -1,3 +1,5 @@
 build
 build-web
 node_modules
+
+.direnv

.husky/pre-commit

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+npx lint-staged

flake.nix

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+{
+  description = "A very basic flake";
+
+  inputs = {
+    nixpkgs = {
+      url = "github:NixOS/nixpkgs/nixos-25.11";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+    flake-utils = {
+      url = "github:numtide/flake-utils";
+    };
+  };
+
+  outputs =
+    {
+      self,
+      nixpkgs,
+      flake-utils,
+    }:
+    flake-utils.lib.eachDefaultSystem (
+      system:
+      let
+        pkgs = import nixpkgs { inherit system; };
+      in
+      {
+        devShell = import ./shell.nix { inherit pkgs; };
+      }
+    );
+}