changing how we store the database information in the env file

.env.example

@@ -5,7 +5,11 @@ PORT=4000
 SECRET_KEY_BASE=REPLACE_WITH_64_CHAR_SECRET  # generate with: mix phx.gen.secret
 
 # Database
-DATABASE_URL=ecto://USER:PASSWORD@HOST/DATABASE
+DB_USER=postgres
+DB_PASS=postgres
+DB_HOST=localhost
+DB_NAME=mixer
+DB_PORT=5432
 ECTO_IPV6=false
 POOL_SIZE=10
 

config/runtime.exs

@@ -23,18 +23,15 @@ end
 config :mixer, MixerWeb.Endpoint, http: [port: String.to_integer(System.get_env("PORT", "4000"))]
 
 if config_env() == :prod do
-  database_url =
-    System.get_env("DATABASE_URL") ||
-      raise """
-      environment variable DATABASE_URL is missing.
-      For example: ecto://USER:PASS@HOST/DATABASE
-      """
-
   maybe_ipv6 = if System.get_env("ECTO_IPV6") in ~w(true 1), do: [:inet6], else: []
 
   config :mixer, Mixer.Repo,
     # ssl: true,
-    url: database_url,
+    username: System.get_env("DB_USER") || raise("Missing environment variable `DB_USER`!"),
+    password: System.get_env("DB_PASS") || raise("Missing environment variable `DB_PASS`!"),
+    host: System.get_env("DB_HOST") || raise("Missing environment variable `DB_HOST`!"),
+    database: System.get_env("DB_NAME") || raise("Missing environment variable `DB_NAME`!"),
+    port: String.to_integer(System.get_env("DB_PORT", "5432")),
     pool_size: String.to_integer(System.get_env("POOL_SIZE") || "10"),
     # For machines with several cores, consider starting multiple pools of `pool_size`
     # pool_count: 4,