Initial version

flake.lock

@@ -0,0 +1,27 @@
+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1592784995,
+        "narHash": "sha256-mj7GnZrzqwiaPf1WQ9HqOJ7eT+NHB1tDNN0mFTlgXzg=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "13c15f26d44cf7f54197891a6f0c78ce8149b037",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-20.03",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -0,0 +1,30 @@
+{
+  inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixos-20.03";
+
+  outputs = { self, nixpkgs }: {
+
+    nixosConfigurations.container = nixpkgs.lib.nixosSystem {
+      system = "x86_64-linux";
+      modules =
+        [ ({ pkgs, ... }: {
+            boot.isContainer = true;
+
+            # Let 'nixos-version --json' know about the Git revision
+            # of this flake.
+            system.configurationRevision = nixpkgs.lib.mkIf (self ? rev) self.rev;
+
+            # Network configuration.
+            networking.useDHCP = false;
+            networking.firewall.allowedTCPPorts = [ 80 ];
+
+            # Enable a web server.
+            services.httpd = {
+              enable = true;
+              adminAddr = "morty@example.org";
+            };
+          })
+        ];
+    };
+
+  };
+}