add cors

backend/Cargo.lock

@@ -129,6 +129,12 @@ version = "1.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
 
+[[package]]
+name = "bitflags"
+version = "2.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b048fb63fd8b5923fc5aa7b340d8e156aec7ec02f0c78fa8a6ddc2613f6f71de"
+
 [[package]]
 name = "bytemuck"
 version = "1.14.0"
@@ -634,7 +640,7 @@ version = "0.16.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3c3287920cb847dee3de33d301c463fba14dda99db24214ddf93f83d3021f4c6"
 dependencies = [
- "bitflags",
+ "bitflags 1.3.2",
  "crc32fast",
  "deflate",
  "miniz_oxide 0.3.7",
@@ -681,6 +687,7 @@ dependencies = [
  "maud",
  "qrcode",
  "tokio",
+ "tower-http",
 ]
 
 [[package]]
@@ -898,6 +905,22 @@ dependencies = [
  "tracing",
 ]
 
+[[package]]
+name = "tower-http"
+version = "0.5.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1e9cd434a998747dd2c4276bc96ee2e0c7a2eadf3cae88e52be55a05fa9053f5"
+dependencies = [
+ "bitflags 2.6.0",
+ "bytes",
+ "http",
+ "http-body",
+ "http-body-util",
+ "pin-project-lite",
+ "tower-layer",
+ "tower-service",
+]
+
 [[package]]
 name = "tower-layer"
 version = "0.3.2"