fix QuickStart guide for our future

README.md

@@ -1,13 +1,17 @@
 # ZenohexPhoenixDemo
 
-To start your Phoenix server:
+Note: we only confirmed the operation of this repository on the cloud VM in `MIX_ENV=prod`
 
-  * Run `mix setup` to install and setup dependencies
-  * Start Phoenix endpoint with `mix phx.server` or inside IEx with `iex -S mix phx.server`
+To start your Phoenix server:
 
-Now you can visit [`localhost:4000`](http://localhost:4000) from your browser.
+  * Adjust [config/config.exs#L15](https://github.com/b5g-ex/zenohex_phoenix_demo/blob/main/config/config.exs#L15) and [config/runtime.exs#L36](https://github.com/b5g-ex/zenohex_phoenix_demo/blob/main/config/runtime.exs#L36) to your server's URL
+  * Run `mix deps.get --only prod` to install and setup dependencies
+  * Run `MIX_ENV=prod mix compile` to compile project
+  * Run `MIX_ENV=prod mix assets.deploy` to assets
+  * Run `MIX_ENV=prod mix phx.gen.secret`, and set the result to `$SECRET_KEY_BASE`
+  * Then, start Phoenix endpoint with `mix phx.server` or inside IEx with `iex -S mix phx.server`
 
-Ready to run in production? Please [check our deployment guides](https://hexdocs.pm/phoenix/deployment.html).
+Now you can visit `<your_vm_url>:4000` from your browser.
 
 ## Learn more