fix broken install step

CONTRIBUTING.md

@@ -127,7 +127,7 @@ In `test` mode (or in the Docker container), Cannery will listen for the same en
 In `prod` mode (or in the Docker container), Cannery will listen for the same environment variables as dev mode, but also include the following at runtime:
 
 - `SECRET_KEY_BASE`: Secret key base used to sign cookies. Must be generated
-  with `docker run -it shibaobun/cannery mix phx.gen.secret` and set for server to start.
+  with `docker run -it shibaobun/cannery priv/random.sh` and set for server to start.
 - `SMTP_HOST`: The url for your SMTP email provider. Must be set
 - `SMTP_PORT`: The port for your SMTP relay. Defaults to `587`.
 - `SMTP_USERNAME`: The username for your SMTP relay. Must be set!

README.md

@@ -60,7 +60,7 @@ You can use the following environment variables to configure Cannery in
   Defaults to `false`.
 - `POOL_SIZE`: Controls the pool size to use with PostgreSQL. Defaults to `10`.
 - `SECRET_KEY_BASE`: Secret key base used to sign cookies. Must be generated
-  with `docker run -it shibaobun/cannery mix phx.gen.secret` and set for server to start.
+  with `docker run -it shibaobun/cannery priv/random.sh` and set for server to start.
 - `REGISTRATION`: Controls if user sign-up should be invite only or set to
   public. Set to `public` to enable public registration. Defaults to `invite`.
 - `LOCALE`: Sets a custom default locale. Defaults to `en_US`

config/runtime.exs

@@ -68,7 +68,7 @@ if config_env() == :prod do
     System.get_env("SECRET_KEY_BASE") ||
       raise """
       environment variable SECRET_KEY_BASE is missing.
-      You can generate one by calling: mix phx.gen.secret
+      You can generate one by calling: priv/random.sh
       """
 
   config :cannery, CanneryWeb.Endpoint, secret_key_base: secret_key_base