chore: Minor updates on new system

Retired and clearly had to give the work laptop back. So now working
on an old NUC running Arch. and there were a few things that didn't
quite work for me when starting, and that just created a whole bunch
of experimentation.  I've unwound everything but the essential
improvements.
* Updated Bollard; this was the crux of my problem and resulted in
                   quite a bit of code change, until I found this:
                   fussybeaver/bollard#345
* A typo or two.
* A clippy warning about unused import.

banner-engine/src/engine.rs

@@ -77,7 +77,7 @@ pub async fn start(
     mut rx: Receiver<Event>,
     tx: Sender<Event>,
 ) -> Result<(), Box<dyn Error + Send + Sync>> {
-    log::info!(target: "task_log", "initialising");
+    log::info!(target: "task_log", "Initialising");
     engine.initialise().await?;
 
     loop {

banner-engine/src/lib.rs

@@ -23,6 +23,6 @@ pub use crate::pipeline::*;
 pub use crate::pragma::*;
 pub use crate::select::*;
 pub use crate::tasks::*;
-pub use crate::tasks::*;
+
 pub use banner_parser::ast::{IdentifierListItem, JobSpecification, PipelineSpecification};
 pub use banner_parser::parser::parse_file;

local-engine/Cargo.toml

@@ -21,7 +21,7 @@ log = {workspace = true}
 futures = {workspace = true}
 futures-util = {workspace = true}
 
-bollard = "0.14"
+bollard = "0.15.0"
 cap-tempfile = "1.0"
 backon = "0.4"
 rand = "*"

pipeline-assets/banner-pipeline.ban

@@ -14,7 +14,7 @@ let rust_build_image = Image {
     ],
     env=[
         BANNER_ENV_VAR="hello banner!",
-        RUSTLOG="${log_level}",
+        RUST_LOG="${log_level}",
         RUST_BACKTRACE="1",
     ]
 }