Update Protobuf README

app/Protobuf/README.md

@@ -1,7 +1,44 @@
-# Protobuf class generation
+# Protobuf How To
 
-## cli
+⚠️ Protobuf classes are generated, do NOT modify the classes manually ⚠️
+
+## Setup
+
+- Install the protobuf compiler
 
 ```sh
+sudo apt install protobuf-compiler
+```
+
+- Install the protobuf PHP extension
+
+```sh
+sudo pecl install protobuf
+```
+
+- Install the composer package
+
+```sh
+composer require google/protobuf
+```
+
+Reference: [protobuf/php](https://github.com/protocolbuffers/protobuf/tree/main/php)
+
+## Generate the class
+
+- Edit the *.proto file
+
+>Reference: [protocol-buffers/docs/proto3](https://developers.google.com/protocol-buffers/docs/proto3)
+
+- Run the following cli command:
+
+```bash
 protoc --proto_path=app/Protobuf/ --php_out=. app/Protobuf/GoogleAuth.proto
 ```
+
+Protoc will generate the files in `app/Protobuf` while we want them to be in `App/protobuf`.
+
+- Moves the files from `app/Protobuf` to `App/protobuf`
+- Update the namespace of the moved files to match their new location
+
+>Reference: [protocol-buffers/docs/php-generated](https://developers.google.com/protocol-buffers/docs/reference/php-generated#invocation)