no more Docker!

* use `termion` rather than `ncurses` to limit runtime deps
* cross-compile with `cross` instead of our own dockerfiles/scripts
* update instructions
* update release procedure and GitHub actions to match
* prep changelog for `v0.7.8`

Fixes #160
Closes #265

server/src/bundled_ui.rs

@@ -22,6 +22,7 @@ struct BuildFile {
     encoding: FileEncoding,
 }
 
+#[allow(unused)] // it's valid for a UI to have all uncompressed files or vice versa.
 #[derive(Copy, Clone)]
 enum FileEncoding {
     Uncompressed,

server/src/main.rs

@@ -25,7 +25,8 @@ mod bundled_ui;
 
 const DEFAULT_DB_DIR: &str = "/var/lib/moonfire-nvr/db";
 
-const VERSION: &str = git_version::git_version!(args = ["--always", "--dirty"]);
+// This is either in the environment when `cargo` is invoked or set from within `build.rs`.
+const VERSION: &str = env!("VERSION");
 
 /// Moonfire NVR: security camera network video recorder.
 #[derive(Bpaf, Debug)]