build: LICENSE, prepare Hex release

LICENSE

@@ -0,0 +1,25 @@
+BSD 2-Clause License
+
+Copyright (c) 2026, Steffen Beyer <steffen@beyer.io>
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+1. Redistributions of source code must retain the above copyright notice, this
+   list of conditions and the following disclaimer.
+
+2. Redistributions in binary form must reproduce the above copyright notice,
+   this list of conditions and the following disclaimer in the documentation
+   and/or other materials provided with the distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

mix.exs

@@ -10,7 +10,9 @@ defmodule Parrhesia.MixProject do
       start_permanent: Mix.env() == :prod,
       deps: deps(),
       aliases: aliases(),
-      docs: docs()
+      docs: docs(),
+      description: description(),
+      package: package()
     ]
   end
 
@@ -52,15 +54,17 @@ defmodule Parrhesia.MixProject do
       {:telemetry_poller, "~> 1.0"},
       {:telemetry_metrics_prometheus, "~> 1.1"},
 
+      # Runtime: outbound WebSocket client (sync transport)
+      {:websockex, "~> 0.4"},
+
       # Test tooling
       {:stream_data, "~> 1.0", only: :test},
-      {:websockex, "~> 0.4"},
 
       # Project tooling
       {:credo, "~> 1.7", only: [:dev, :test], runtime: false},
       {:ex_doc, "~> 0.34", only: :dev, runtime: false},
-      {:deps_changelog, "~> 0.3"},
+      {:deps_changelog, "~> 0.3", only: :dev, runtime: false},
-      {:igniter, "~> 0.6", only: [:dev, :test]}
+      {:igniter, "~> 0.6", only: [:dev, :test], runtime: false}
     ]
   end
 
@@ -82,6 +86,17 @@ defmodule Parrhesia.MixProject do
     ]
   end
 
+  defp description do
+    "Nostr event relay with WebSocket fanout, sync, and access control"
+  end
+
+  defp package do
+    [
+      licenses: ["BSD-2-Clause"],
+      links: %{"GitHub" => "https://git.teralink.net/tribes/parrhesia"}
+    ]
+  end
+
   defp docs do
     [
       main: "readme",