improvement: config and .iex.exs copy in docker image

Dockerfile

@@ -58,8 +58,6 @@ COPY config/runtime.exs config/
 
 COPY rel rel
 RUN mix release
-# iex helpers
-COPY .iex.exs _build/${MIX_ENV}/rel/hello_api
 
 ###########################################################
 
@@ -94,6 +92,9 @@ COPY --from=builder --chown=nobody:root /app/_build/${MIX_ENV}/rel/hello_api ./
 
 USER nobody
 
+# carry iex helpers to /app
+COPY .iex.exs .
+
 # If using an environment that doesn't automatically reap zombie processes, it is
 # advised to add an init process such as tini via `apt-get install`
 # above and adding an entrypoint. See https://github.com/krallin/tini for details

config/config.exs

@@ -3,10 +3,10 @@ import Config
 config :hello_api,
   build_mode: config_env(),
   build_time: DateTime.utc_now(),
+  source_url: Mix.Project.config()[:source_url],
   commit_id: System.get_env("GIT_COMMIT_ID", ""),
-  commit_time: System.get_env("GIT_COMMIT_TIME", ""),
-  source_url: Mix.Project.config()[:source_url]
+  commit_time: System.get_env("GIT_COMMIT_TIME", "")
 
-if config_env() in [:dev] do
-  import_config("#{config_env()}.exs")
+if config_env() == :dev do
+  import_config("git_ops.exs")
 end

lib/hello_api.ex

@@ -1,19 +1,32 @@
 defmodule HelloApi do
-  @app :hello_api
+  # @app :hello_api
+  # def app, do: @app
+  def app, do: Application.get_application(__MODULE__)
+
+  def vsn, do: Application.spec(app(), :vsn) |> to_string()
+  def source_url, do: Application.get_env(app(), :source_url)
+  def build_mode, do: Application.get_env(app(), :build_mode)
+  def build_time, do: Application.get_env(app(), :build_time) |> to_string
 
   def build_info do
     %{
+      app: app(),
       version: vsn(),
-      build_mode: Application.get_env(@app, :build_mode),
-      build_time: Application.get_env(@app, :build_time) |> to_string,
-      source_url: Application.get_env(@app, :source_url),
-      commit_id: Application.get_env(@app, :commit_id, "") |> String.trim(),
-      commit_time: Application.get_env(@app, :commit_time, "") |> parse_commit_time,
-      system: System.build_info()
+      source_url: source_url(),
+      build_mode: build_mode(),
+      build_time: build_time(),
+      system: System.build_info(),
+      commit: commit()
     }
   end
 
-  def vsn, do: Application.spec(@app, :vsn) |> to_string()
+  # put into standalone hex pkg?
+  def commit do
+    %{
+      commit_id: Application.get_env(app(), :commit_id, "") |> String.trim(),
+      commit_time: Application.get_env(app(), :commit_time, "") |> parse_commit_time
+    }
+  end
 
   def parse_commit_time(""), do: nil