Upgrade to Actix V2, bump SQLX version, code cleanup, intergrate ratelimiter (#288)

* Upgrade to Actix V2, bump SQLX version, code cleanup, intergrate ratelimiter

* Add pack file path validation

* Fix compilation error caused by incorrect merge

build.rs

@@ -1,58 +1,3 @@
-use std::fs;
-use std::path::{Path, PathBuf};
 fn main() {
-    let dir = std::env::var("OUT_DIR").unwrap();
-    let mut target = PathBuf::from(dir);
-    target.pop();
-    target.pop();
-    target.pop();
-    target.push("migrations");
-    println!("Output: {}", target.to_str().unwrap());
-    copy("migrations", target).unwrap();
-}
-
-pub fn copy<U: AsRef<Path>, V: AsRef<Path>>(from: U, to: V) -> Result<(), std::io::Error> {
-    let mut stack = vec![PathBuf::from(from.as_ref())];
-
-    let output_root = PathBuf::from(to.as_ref());
-    let input_root = PathBuf::from(from.as_ref()).components().count();
-
-    while let Some(working_path) = stack.pop() {
-        println!("process: {:?}", &working_path);
-
-        // Generate a relative path
-        let src: PathBuf = working_path.components().skip(input_root).collect();
-
-        // Create a destination if missing
-        let dest = if src.components().count() == 0 {
-            output_root.clone()
-        } else {
-            output_root.join(&src)
-        };
-        if fs::metadata(&dest).is_err() {
-            println!(" mkdir: {:?}", dest);
-            fs::create_dir_all(&dest)?;
-        }
-
-        for entry in fs::read_dir(working_path)? {
-            let entry = entry?;
-            let path = entry.path();
-            if path.is_dir() {
-                stack.push(path);
-            } else {
-                match path.file_name() {
-                    Some(filename) => {
-                        let dest_path = dest.join(filename);
-                        println!("  copy: {:?} -> {:?}", &path, &dest_path);
-                        fs::copy(&path, &dest_path)?;
-                    }
-                    None => {
-                        println!("failed: {:?}", path);
-                    }
-                }
-            }
-        }
-    }
-
-    Ok(())
+    println!("cargo:rerun-if-changed=migrations");
 }