From a4988e5cd47285c4e42e9430279eb66a554e0b9d Mon Sep 17 00:00:00 2001
From: Drew Bonasera <Drewsif@users.noreply.github.com>
Date: Mon, 27 Apr 2026 02:33:06 -0400
Subject: [PATCH 1/2] Install netcat in the dev container and make the database
 hostname configurable.

- build(devcontainer): Install netcat-traditional package
- feat(config): Make database hostname configurable via DB_HOST env var
---
 .devcontainer/Dockerfile | 1 +
 config/dev.exs           | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/.devcontainer/Dockerfile b/.devcontainer/Dockerfile
index 59dfcc15..d2fcdeb6 100644
--- a/.devcontainer/Dockerfile
+++ b/.devcontainer/Dockerfile
@@ -15,6 +15,7 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
     vim \
     net-tools \
     procps \
+    netcat-traditional \
     # Optionally add any other tools you need, e.g. vim, wget...
     && curl -sL https://deb.nodesource.com/setup_18.x | bash - \
     && apt-get install -y --no-install-recommends nodejs inotify-tools \
diff --git a/config/dev.exs b/config/dev.exs
index 7b18a442..9991ddd7 100644
--- a/config/dev.exs
+++ b/config/dev.exs
@@ -4,7 +4,7 @@ import Config
 config :wanderer_app, WandererApp.Repo,
   username: "postgres",
   password: "postgres",
-  hostname: "localhost",
+  hostname: System.get_env("DB_HOST", "localhost"),
   database: "wanderer_dev",
   stacktrace: true,
   show_sensitive_data_on_connection_error: true,

From ddf34351c96abc1b088636659766caf30c408a52 Mon Sep 17 00:00:00 2001
From: Drew Bonasera <Drewsif@users.noreply.github.com>
Date: Tue, 2 Jun 2026 08:40:10 -0400
Subject: [PATCH 2/2] Move the `DB_HOST` environment variable evaluation from
 compile-time configuration to runtime configuration for the development and
 test environments. The compile-time `dev` and `test` configurations now
 default the database hostname to `localhost`.

- fix(config): Set default database hostname to `localhost` in `dev.exs` and `test.exs`
- fix(config): Add `DB_HOST` environment variable override for dev and test environments to `runtime.exs`
---
 config/dev.exs     | 2 +-
 config/runtime.exs | 6 ++++++
 config/test.exs    | 2 +-
 3 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/config/dev.exs b/config/dev.exs
index 9991ddd7..7b18a442 100644
--- a/config/dev.exs
+++ b/config/dev.exs
@@ -4,7 +4,7 @@ import Config
 config :wanderer_app, WandererApp.Repo,
   username: "postgres",
   password: "postgres",
-  hostname: System.get_env("DB_HOST", "localhost"),
+  hostname: "localhost",
   database: "wanderer_dev",
   stacktrace: true,
   show_sensitive_data_on_connection_error: true,
diff --git a/config/runtime.exs b/config/runtime.exs
index 4f53cd05..adccbf30 100644
--- a/config/runtime.exs
+++ b/config/runtime.exs
@@ -5,6 +5,12 @@ if System.get_env("PHX_SERVER") do
   config :wanderer_app, WandererAppWeb.Endpoint, server: true
 end
 
+if config_env() in [:dev, :test] do
+  if db_host = System.get_env("DB_HOST") do
+    config :wanderer_app, WandererApp.Repo, hostname: db_host
+  end
+end
+
 config_dir = System.get_env("CONFIG_DIR", "/run/secrets")
 
 app_name = System.get_env("FLY_APP_NAME", "NOT_FLY_APP")
diff --git a/config/test.exs b/config/test.exs
index 3a9d0b38..728886f4 100644
--- a/config/test.exs
+++ b/config/test.exs
@@ -12,7 +12,7 @@ config :ash, :disable_async?, true
 config :wanderer_app, WandererApp.Repo,
   username: "postgres",
   password: "postgres",
-  hostname: System.get_env("DB_HOST", "localhost"),
+  hostname: "localhost",
   database: "wanderer_test#{System.get_env("MIX_TEST_PARTITION")}",
   pool: Ecto.Adapters.SQL.Sandbox,
   pool_size: 20,