chore: add gitignore and build configuration

config/config.exs

@@ -0,0 +1,14 @@
+import Config
+
+config :excache,
+  shard_count: 8,
+  sweep_interval: 1000,
+  port: String.to_integer(System.get_env("EXCACHE_PORT") || "6379"),
+  snapshot_path: System.get_env("EXCACHE_SNAPSHOT_PATH"),
+  aof_path: System.get_env("EXCACHE_AOF_PATH"),
+  aof_fsync: :everysec,
+  keyspace_notifications: true
+
+if File.exists?(Path.join(__DIR__, "#{config_env()}.exs")) do
+  import_config "#{config_env()}.exs"
+end

config/test.exs

@@ -0,0 +1,5 @@
+import Config
+
+config :excache,
+  port: nil,
+  sweep_interval: 50