reduce debug output in release/bench builds

This reduces the binary size from 154 MiB to 70 MiB (#70 progress).
Tools like `cargo flamegraph` still work fine.

As suggested by "EarthFeet" on reddit:
https://www.reddit.com/r/rust/comments/rw0jad/cargos_strip_profile_option_has_been_stabilized/hra193k/

CHANGELOG.md

@@ -15,6 +15,8 @@ Each release is tagged in Git and on the Docker repository
 *   fix [#184](https://github.com/scottlamb/moonfire-nvr/issues/184):
     Moonfire NVR would stop recording on a camera that hit the live555 stale
     file descriptor bug, rather than waiting for the stale session to expire.
+*   progress on [#70](https://github.com/scottlamb/moonfire-nvr/issues/184):
+    shrink the binary from 154 MiB to 70 MiB by reducing debugging information.
 
 ## `v0.7.1` (2021-10-27)
 

server/Cargo.toml

@@ -76,7 +76,7 @@ tempfile = "3.2.0"
 opt-level = 2
 
 [profile.release]
-debug = true
+debug = 1
 
 [profile.bench]
-debug = true
+debug = 1