Initial

README.md

@@ -1,20 +1,24 @@
 # Envhead
 
-Envhead is a crate that creates environment variable names using a static prefix. The desired prefix is defined in your build script `build.rs`.
+Envhead is a crate that creates environment variable names using a static prefix.
 
-### Usage
+## Setup
+First, you should define the prefix by setting the `ENV_HEAD_PREFIX` environment variable to the desired value. When the `ENV_HEAD_PREFIX` variable is not defined, `ENV` is used as the default prefix. In the following examples, we will use `MY_APP` as the prefix.
 
-First, you should define the prefix in your `build.rs` file. In this example, we will use `MY_APP` as the prefix:
+In case you are working with macOS or Linux, you might use Bash like this:
 
-```rust
-fn main() {
-    println!("cargo:rustc-env=ENV_HEAD_PREFIX=MY_APP");
-}
+```bash
+ENV_HEAD_PREFIX=MY_APP cargo build
 ```
 
-When the `ENV_HEAD_PREFIX` variable is not defined, `ENV` is used as the default prefix.
+Using an IDE from JetBrains like [RustRover](https://www.jetbrains.com/rust/), you can set the environment variable in the [run configuration](https://www.jetbrains.com/help/rust/cargo-run-debug-configuration.html) and for your [integrated terminal](https://www.jetbrains.com/help/clion/settings-tools-terminal.html).
 
-Then, in your code, you can use the `envhead!` macro to create environment variable names.
+Do you use a CI/CD pipeline? You can set the environment variable in your pipeline configuration. Do you build your application in a Docker container? You can set the environment variable in your Dockerfile as well.
+
+**Please notice:** This setup procedure is required just for the development environment. Your compiled program(s) will not depend on the `ENV_HEAD_PREFIX` environment variable.
+
+## Usage
+Now, in your code, you can use the `envhead!` macro to create environment variable names.
 
 ```rust
 use envhead::envhead;