improve error handling by using error-stack crate

Cargo.lock

@@ -268,6 +268,12 @@ dependencies = [
  "alloc-no-stdlib",
 ]
 
+[[package]]
+name = "anyhow"
+version = "1.0.71"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9c7d0618f0e0b7e8ff11427422b64564d5fb0be1940354bfe2e0529b18a9d9b8"
+
 [[package]]
 name = "askama_escape"
 version = "0.10.3"
@@ -733,6 +739,16 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "error-stack"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5f00447f331c7f726db5b8532ebc9163519eed03c6d7c8b73c90b3ff5646ac85"
+dependencies = [
+ "anyhow",
+ "rustc_version 0.4.0",
+]
+
 [[package]]
 name = "failure"
 version = "0.1.8"
@@ -3373,6 +3389,7 @@ dependencies = [
  "actix-files",
  "actix-web",
  "env_logger",
+ "error-stack",
  "fake-useragent",
  "handlebars",
  "log",