server: fix clippy's suggestions

server/src/infra/graphql/api.rs

@@ -43,7 +43,7 @@ pub fn export_schema(opts: ExportGraphQLSchemaOpts) -> anyhow::Result<()> {
             use std::path::Path;
             let path = Path::new(&path);
             let mut file =
-                File::create(&path).context(format!("unable to open '{}'", path.display()))?;
+                File::create(path).context(format!("unable to open '{}'", path.display()))?;
             file.write_all(output.as_bytes())
                 .context(format!("unable to write in '{}'", path.display()))?;
         }

server/src/main.rs

@@ -170,7 +170,7 @@ fn run_healthcheck(opts: RunOpts) -> Result<()> {
             failure = true;
             error!("{:#}", e)
         });
-    std::process::exit(if failure { 1 } else { 0 })
+    std::process::exit(i32::from(failure))
 }
 
 fn main() -> Result<()> {