diff --git a/config.exs b/config.exs
new file mode 100644
index 0000000..05bcc65
--- /dev/null
+++ b/config.exs
@@ -0,0 +1,91 @@
+# Mobilizon instance configuration
+
+import Config
+
+listen_ip = System.get_env("MOBILIZON_INSTANCE_LISTEN_IP", "0.0.0.0")
+
+listen_ip =
+  case listen_ip |> to_charlist() |> :inet.parse_address() do
+    {:ok, listen_ip} -> listen_ip
+    _ -> raise "MOBILIZON_INSTANCE_LISTEN_IP does not match the expected IP format."
+  end
+
+config :mobilizon, Mobilizon.Web.Endpoint,
+  server: true,
+  url: [host: System.get_env("MOBILIZON_INSTANCE_HOST", "mobilizon.lan")],
+  http: [
+    port: String.to_integer(System.get_env("MOBILIZON_INSTANCE_PORT", "4000")),
+    ip: listen_ip
+  ],
+  secret_key_base: System.get_env("MOBILIZON_INSTANCE_SECRET_KEY_BASE", "changethis")
+
+config :mobilizon, Mobilizon.Web.Auth.Guardian,
+  secret_key: System.get_env("MOBILIZON_INSTANCE_SECRET_KEY", "changethis")
+
+config :mobilizon, :instance,
+  name: System.get_env("MOBILIZON_INSTANCE_NAME", "Mobilizon"),
+  description: "Change this to a proper description of your instance",
+  hostname: System.get_env("MOBILIZON_INSTANCE_HOST", "mobilizon.lan"),
+  registrations_open: System.get_env("MOBILIZON_INSTANCE_REGISTRATIONS_OPEN", "false") == "true",
+  demo: false,
+  allow_relay: true,
+  federating: true,
+  email_from: System.get_env("MOBILIZON_INSTANCE_EMAIL", "noreply@mobilizon.lan"),
+  email_reply_to: System.get_env("MOBILIZON_REPLY_EMAIL", "noreply@mobilizon.lan")
+
+config :mobilizon, Mobilizon.Storage.Repo,
+  adapter: Ecto.Adapters.Postgres,
+  username: System.get_env("MOBILIZON_DATABASE_USERNAME", "username"),
+  password: System.get_env("MOBILIZON_DATABASE_PASSWORD", "password"),
+  database: System.get_env("MOBILIZON_DATABASE_DBNAME", "mobilizon"),
+  hostname: System.get_env("MOBILIZON_DATABASE_HOST", "postgres"),
+  port: System.get_env("MOBILIZON_DATABASE_PORT", "5432"),
+  ssl: System.get_env("MOBILIZON_DATABASE_SSL", "false") == "true",
+  pool_size: 10
+
+config :mobilizon, Mobilizon.Web.Email.Mailer,
+  adapter: Swoosh.Adapters.SMTP,
+  relay: System.get_env("MOBILIZON_SMTP_SERVER", "localhost"),
+  port: System.get_env("MOBILIZON_SMTP_PORT", "25"),
+  username: System.get_env("MOBILIZON_SMTP_USERNAME", nil),
+  password: System.get_env("MOBILIZON_SMTP_PASSWORD", nil),
+  tls: :if_available,
+  allowed_tls_versions: [:"tlsv1.2", :"tlsv1.3"],
+  tls_options: [
+    verify: :verify_peer,
+    versions: [:"tlsv1.2", :"tlsv1.3"],
+    cacerts: :public_key.cacerts_get(),
+    server_name_indication: System.get_env("MOBILIZON_SMTP_SERVER", "localhost"),
+    depth: 99
+  ],
+  ssl: System.get_env("MOBILIZON_SMTP_SSL", "false"),
+  retries: 1,
+  no_mx_lookups: false,
+  auth: :if_available
+
+config :geolix,
+  databases: [
+    %{
+      id: :city,
+      adapter: Geolix.Adapter.MMDB2,
+      source: "/var/lib/mobilizon/geo_db/GeoLite2-City.mmdb"
+    }
+  ]
+
+config :mobilizon, Mobilizon.Web.Upload.Uploader.Local,
+  uploads: System.get_env("MOBILIZON_UPLOADS", "/var/lib/mobilizon/uploads")
+
+config :mobilizon, :exports,
+  path: System.get_env("MOBILIZON_UPLOADS_EXPORTS", "/var/lib/mobilizon/uploads/exports"),
+  formats: [
+    Mobilizon.Service.Export.Participants.CSV,
+    Mobilizon.Service.Export.Participants.PDF,
+    Mobilizon.Service.Export.Participants.ODS
+  ]
+
+config :tz_world,
+  data_dir: System.get_env("MOBILIZON_TIMEZONES_DIR", "/var/lib/mobilizon/timezones")
+
+config :tzdata, :data_dir, System.get_env("MOBILIZON_TIMEZONES_DIR", "/var/lib/mobilizon/tzdata")
+
+config :logger, :console, format: "[$level] $message\n", level: :debug