chore: Add nix flake file with direnv

.dockerignore

@@ -8,4 +8,5 @@ npm-debug.log
 /kotlin/.gradle
 /kotlin/.idea
 /kotlin/build
-/kotlin/jflex*
+/kotlin/jflex*
+.direnv

.envrc

@@ -0,0 +1,4 @@
+if ! has nix_direnv_version || ! nix_direnv_version 3.0.5; then
+    source_url "https://raw.githubusercontent.com/nix-community/nix-direnv/3.0.5/direnvrc" "sha256-RuwIS+QKFj/T9M2TFXScjBsLR6V3A17YVoEW/Q6AZ1w="
+fi
+use flake

.gitignore

@@ -6,6 +6,7 @@
 /.yarn
 /kotlin/jflex*.jar
 /tsconfig.tsbuildinfo
+/.direnv
 
 # dependencies
 /node_modules

Dockerfile

@@ -9,7 +9,7 @@ WORKDIR /app
 
 # Install dependencies based on the preferred package manager
 COPY package.json pnpm-lock.yaml* ./
-RUN yarn global add pnpm && pnpm i
+RUN corepack enable && pnpm i
 
 FROM gradle:8.6.0-jdk11 AS kdeps
 WORKDIR /app
@@ -35,7 +35,7 @@ COPY . .
 # Uncomment the following line in case you want to disable telemetry during the build.
 ENV NEXT_TELEMETRY_DISABLED 1
 
-RUN yarn global add pnpm && pnpm run buildnd
+RUN corepack enable && pnpm run buildnd
 
 # If using npm comment out above and use below instead
 # RUN npm run build

flake.nix

@@ -0,0 +1,25 @@
+{
+  description = "A basic flake with a shell";
+  inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
+  inputs.flake-utils.url = "github:numtide/flake-utils";
+
+  outputs = { nixpkgs, flake-utils, ... }:
+    flake-utils.lib.eachDefaultSystem (system:
+      let
+        pkgs = nixpkgs.legacyPackages.${system};
+        corepack = with pkgs; stdenv.mkDerivation {
+            name = "corepack";
+            buildInputs = [ pkgs.nodejs-slim ];
+            phases = [ "installPhase" ];
+              installPhase = ''
+                  mkdir -p $out/bin
+                  corepack enable --install-directory=$out/bin
+              '';
+        };
+      in
+      {
+        devShells.default = with pkgs; mkShell {
+          packages = [ bashInteractive corepack ];
+        };
+      });
+}