Source .env in bin/dev so Overmind inherits HOST/PORT

Overmind (unlike Foreman) does not auto-load .env, so HOST was never
reaching Rails through bin/dev at all — Procfile.dev's \${HOST:?...}
would have fired on every launch. Source .env in bin/dev before
exec'ing Overmind so HOST/PORT are inherited by the spawned
processes. Update .env.sample and development.rb comments that
incorrectly credited Foreman.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: dadachi

.env.sample

@@ -1,5 +1,5 @@
-# Copy to .env and set HOST to your current Wi-Fi IP, then Foreman
-# auto-loads this when running `bin/dev`.
+# Copy to .env and set HOST to your current Wi-Fi IP. `bin/dev`
+# sources this before launching Overmind.
 #
 # Rails, the iOS app, and the Android app must all agree on one
 # reachable address — your host's current Wi-Fi IP. On macOS:

bin/dev

@@ -1,5 +1,13 @@
 #!/usr/bin/env sh
 
+# Load .env so HOST/PORT are inherited by Overmind and the spawned
+# processes. Overmind (unlike Foreman) does not auto-load .env.
+if [ -f .env ]; then
+  set -a
+  . ./.env
+  set +a
+fi
+
 # Default to port 3000 if not specified
 export PORT="${PORT:-3000}"
 

config/environments/development.rb

@@ -38,9 +38,9 @@
 
   config.action_mailer.perform_caching = false
 
-  # HOST is only loaded into ENV by Foreman under `bin/dev`; direct Rails
-  # invocations (console, test, setup, CI) don't see .env, so default to
-  # localhost for the mailer so boot succeeds. `Procfile.dev` still refuses
+  # .env is sourced by bin/dev for the dev server only; direct Rails
+  # invocations (console, test, setup, CI) don't see it, so default to
+  # localhost for the mailer so boot succeeds. Procfile.dev still refuses
   # to start the dev server without an explicit HOST.
   config.action_mailer.default_url_options = {host: ENV.fetch("HOST", "localhost"), port: ENV.fetch("PORT", 3000).to_i}