docs: 📝 Add quickstart section

README.md

@@ -37,6 +37,42 @@ cargo install espup --git https://github.com/esp-rs/espup
 ```
 It's also possible to directly download the pre-compiled [release binaries](https://github.com/esp-rs/espup/releases) or using [cargo-binstall](https://github.com/cargo-bins/cargo-binstall).
 
+
+## Quickstart
+See [Usage](#usage) section for more details.
+### Install
+- [`no_std`](https://esp-rs.github.io/book/overview/bare-metal.html)
+  ```sh
+  espup install
+  # Unix
+  . ./export-esp.sh
+  # Windows
+  .\export-esp.ps1
+  ```
+- [`std`](https://esp-rs.github.io/book/overview/using-the-standard-library.html):
+  Installing `esp-idf` via `espup` is not mandatory, as [`esp-idf-sys`](https://github.com/esp-rs/esp-idf-sys) already takes care of it, but has some benefits.
+  ```sh
+  espup install --espidf-version <ESPIDF_VERSION>
+  # Unix
+  . ./export-esp.sh
+  # Windows
+  .\export-esp.ps1
+  ```
+
+> **Warning**
+>
+> The generated export file, by default `export-esp`, needs to be sourced in every terminal
+> before building an application.
+### Uninstall
+```sh
+  espup uninstall
+```
+
+### Update
+```sh
+  espup update --toolchain-version <TOOLCHAIN_VERSION>
+```
+
 ## Usage
 
 ```

src/main.rs

@@ -19,7 +19,7 @@ use espup::{
         },
     },
 };
-use log::{debug, info};
+use log::{debug, info, warn};
 use std::{
     collections::HashSet,
     fs::{remove_dir_all, File},
@@ -204,6 +204,10 @@ fn install(args: InstallOpts) -> Result<()> {
     export_environment(&export_file, &exports)?;
 
     info!("{} Installation suscesfully completed!", emoji::CHECK);
+    warn!(
+        "{} Please, source the export file, as state above, to properly setup the environment!",
+        emoji::WARN
+    );
     Ok(())
 }
 
@@ -290,18 +294,18 @@ pub fn export_environment(export_file: &PathBuf, exports: &[String]) -> Result<(
         file.write_all(b"\n")?;
     }
     #[cfg(windows)]
-    info!(
+    warn!(
         "{} PLEASE set up the environment variables running: '.\\{}'",
         emoji::INFO,
         export_file.display()
     );
     #[cfg(unix)]
-    info!(
+    warn!(
         "{} PLEASE set up the environment variables running: '. ./{}'",
         emoji::INFO,
         export_file.display()
     );
-    info!(
+    warn!(
         "{} This step must be done every time you open a new terminal.",
         emoji::WARN
     );