chore: update and pin rust version

pepperoni505 · pepperoni505 · commit 5d3718d1b806 · 2025-10-28T14:02:05.000+01:00
diff --git a/Dockerfile b/Dockerfile
@@ -1,4 +1,4 @@
-FROM rust:1.84-slim-bookworm
+FROM rust:1.90-slim-bookworm
 
 WORKDIR /build
 
diff --git a/rust-toolchain.toml b/rust-toolchain.toml
@@ -0,0 +1,2 @@
+[toolchain]
+channel = "1.90"
