switch to sqlite database configuration

config/dev.exs

···
 
 # Configure your database
 config :elixir_blonk, ElixirBlonk.Repo,
-  username: "postgres",
-  password: "postgres",
-  hostname: "localhost",
-  database: "elixir_blonk_dev",
+  database: "blonk.db",
   stacktrace: true,
-  show_sensitive_data_on_connection_error: true,
-  pool_size: 10
+  show_sensitive_data_on_connection_error: true
 
 # For development, we disable any cache and enable
 # debugging and code reloading.