feat: add nix flake and .devcontainer.json

.devcontainer.json

@@ -0,0 +1,44 @@
+{
+  "customizations": {
+    "vscode": {
+      "extensions": [
+        "mkhl.direnv",
+        "esbenp.prettier-vscode",
+        "dbaeumer.vscode-eslint",
+        "bradlc.vscode-tailwindcss",
+        "yoavbls.pretty-ts-errors"
+      ],
+      "settings": {
+        "editor.tabSize": 2,
+        "editor.defaultFormatter": "esbenp.prettier-vscode",
+        "editor.formatOnSave": true,
+        "editor.codeActionsOnSave": {
+          "source.fixAll": "explicit",
+          "source.fixAll.eslint": "explicit",
+          "source.fixAll.stylelint": "explicit"
+        },
+        "eslint.validate": [
+          "javascript",
+          "javascriptreact",
+          "typescript",
+          "typescriptreact"
+        ],
+        "eslint.workingDirectories": [
+          {
+            "mode": "auto"
+          }
+        ],
+        "tailwindCSS.experimental.classRegex": [
+          ["cva\\(([^)]*)\\)", "[\"'`]([^\"'`]*).*?[\"'`]"]
+        ]
+      }
+    }
+  },
+  "image": "ghcr.io/cachix/devenv:latest",
+  "overrideCommand": false,
+  "updateContentCommand": "direnv reload",
+  "remoteEnv": { "LOCAL_WORKSPACE_FOLDER": "${localWorkspaceFolder}" },
+  "features": {
+    "ghcr.io/devcontainers/features/docker-in-docker:2": {}
+  }
+}

.envrc

@@ -0,0 +1,10 @@
+if ! has nix_direnv_version || ! nix_direnv_version 2.2.1; then
+  source_url "https://raw.githubusercontent.com/nix-community/nix-direnv/2.2.1/direnvrc" "sha256-zelF0vLbEl5uaqrfIzbgNzJWGmLzCmYAkInj/LNxvKs="
+fi
+
+watch_file flake.nix
+watch_file flake.lock
+if ! use flake . --no-pure-eval --accept-flake-config
+then
+  echo "devenv could not be built. The devenv environment was not loaded. Make the necessary changes to devenv.nix and hit enter to try again." >&2
+fi

.gitignore

@@ -15,3 +15,6 @@ public/dist
 !.vscode/extensions.json
 .idea
 /payload.config.ts
+.devenv
+.direnv
+.pnpm-store

flake.nix

@@ -0,0 +1,65 @@
+{
+  inputs = {
+    nixpkgs.url = "github:cachix/devenv-nixpkgs/rolling";
+    systems.url = "github:nix-systems/default";
+    devenv.url = "github:cachix/devenv";
+    devenv.inputs.nixpkgs.follows = "nixpkgs";
+  };
+
+  nixConfig = {
+    extra-trusted-public-keys = "devenv.cachix.org-1:w1cLUi8dv3hnoSPGAuibQv+f9TZLr6cv/Hm9XgU50cw=";
+    extra-substituters = "https://devenv.cachix.org";
+  };
+
+  outputs = {
+    self,
+    nixpkgs,
+    devenv,
+    systems,
+    ...
+  } @ inputs: let
+    forEachSystem = nixpkgs.lib.genAttrs (import systems);
+  in {
+    packages = forEachSystem (system: {
+      devenv-up = self.devShells.${system}.default.config.procfileScript;
+      devenv-test = self.devShells.${system}.default.config.test;
+    });
+
+    devShells =
+      forEachSystem
+      (system: let
+        pkgs = nixpkgs.legacyPackages.${system};
+        bun = pkgs.bun.overrideAttrs (oldAttrs: {
+          buildInputs = oldAttrs.buildInputs or [] ++ [pkgs.makeWrapper];
+          postInstall =
+            oldAttrs.postInstall
+            or ""
+            + ''
+              wrapProgram $out/bin/bun \
+                --set LD_LIBRARY_PATH "${pkgs.stdenv.cc.cc.lib}/lib/:$LD_LIBRARY_PATH"
+            '';
+        });
+      in {
+        default = devenv.lib.mkShell {
+          inherit inputs pkgs;
+          modules = [
+            {
+              packages = with pkgs; [bash mongodb-tools docker bun];
+
+              # FIXME: this is only required within the dev container
+              enterShell = ''
+                export PATH="$PATH:/usr/local/bin"
+              '';
+
+              languages.javascript = {
+                enable = true;
+                package = pkgs.nodejs-slim_22;
+                pnpm.enable = true;
+                pnpm.install.enable = true;
+              };
+            }
+          ];
+        };
+      });
+  };
+}