add rust-toolchain.toml per dependency on nightly (bytecodealliance#21)

Signed-off-by: Vaughn Dice <[email protected]>
vados-cosmonic · Oct 19, 2023 · ed8424a · ed8424a
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diff --git a/README.md b/README.md
@@ -43,7 +43,7 @@ Using WASI Virt, those specific file paths can be mounted and virtualized into t
 
 ## Basic Usage
 
-Make sure to run Cargo nightly (`rustup default nightly`).
+Note: This project requires [Cargo nightly](./rust-toolchain.toml).
 
 Then:
 

diff --git a/rust-toolchain.toml b/rust-toolchain.toml
@@ -0,0 +1,2 @@
+[toolchain]
+channel = "nightly"