feat: setup postgres with docker compose (#85)

* feat: add postgres to docker compose

* feat: run migrations via entrypoint

* chore: tidy .env.example

* fix: allow empty strings for optional envs

* fix: remove external from kan-network

* chore: update readme

apps/web/next.config.js

@@ -10,6 +10,7 @@ configureRuntimeEnv();
 
 /** @type {import("next").NextConfig} */
 const config = {
+  output: "standalone",
   reactStrictMode: true,
 
   /** Enables hot reloading for local packages without a build step */