Make root README.md a symlink

- upadate *dotenv/README.md* with the latest changest from *README.md*
- make *README.md* a symbolic link pointing to *dotenv/README.md*

This change mirrors the README setup in axum.

README.md

@@ -0,0 +1 @@
+dotenv/README.md

dotenv/README.md

@@ -22,29 +22,24 @@ This library loads environment variables from a _.env_ file. This is convenient
 
 ### Loading at runtime
 
-```rust
+```rs
+use dotenvy::dotenv;
 use std::env;
-use std::error::Error;
 
-fn main() -> Result<(), Box<dyn Error>> {
-    // Load environment variables from .env file.
-    // Fails if .env file not found, not readable or invalid.
-    dotenvy::dotenv()?;
+fn main() {
+    // load environment variables from .env file
+    dotenv().expect(".env file not found");
 
     for (key, value) in env::vars() {
         println!("{key}: {value}");
     }
-
-    Ok(())
 }
 ```
 
 ### Loading at compile time
 
 The `dotenv!` macro provided by `dotenvy_macro` crate can be used.
 
-Warning: there is an outstanding issue with rust-analyzer ([rust-analyzer #9606](https://github.com/rust-analyzer/rust-analyzer/issues/9606)) related to the `dotenv!` macro
-
 ## Minimum supported Rust version
 
 Currently: **1.68.0**
@@ -62,19 +57,26 @@ This fork intends to serve as the development home for the dotenv implementation
 
 This repo fixes:
 
+- home directory works correctly (no longer using the deprecated `std::env::home_dir`)
 - more helpful errors for `dotenv!` ([dotenv-rs/dotenv #57](https://github.com/dotenv-rs/dotenv/pull/57))
 
 It also adds:
 
 - multiline support for environment variable values
 - `io::Read` support via [`from_read`](https://docs.rs/dotenvy/latest/dotenvy/fn.from_read.html) and [`from_read_iter`](https://docs.rs/dotenvy/latest/dotenvy/fn.from_read_iter.html)
-- override support via [`dotenv_override`], [`from_filename_override`], [`from_path_override`] and [`from_read_override`]
 - improved docs
 
 For a full list of changes, refer to the [changelog](./CHANGELOG.md).
 
+## Contributing
+
+Thank you very much for considering to contribute to this project! See
+[CONTRIBUTING.md](./CONTRIBUTING.md) for details.
+
+**Note**: Before you take the time to open a pull request, please open an issue first.
+
 ## The legend
 
 Legend has it that the Lost Maintainer will return, merging changes from `dotenvy` into `dotenv` with such thrust that all `Cargo.toml`s will lose one keystroke. Only then shall the Rust dotenv crateverse be united in true harmony.
 
-Until then, this repo dutifully carries on the dotenv torch. It is actively maintained. Contributions and PRs are very welcome!
+Until then, this repo dutifully carries on the dotenv torch. It is actively maintained.