Write a deployment packaging script

The packaging script and the configuration files around it are based on
the ones from the

  `Vectornaut/dyna3:demo-summer-2025`

branch.

README.md

@@ -65,3 +65,17 @@ The latest prototype is in the folder `app-proto`. It includes both a user inter
 
 1. Go into the `app-proto` folder
 2. Call `cargo test`
+
+### Deploy the prototype
+
+1. From the `app-proto` folder, call `trunk build --release`.
+   - Building in [release mode](https://doc.rust-lang.org/cargo/reference/profiles.html#release) produces an executable which is smaller and often much faster, but harder to debug and more time-consuming to build.
+2. Use `bash` to run the packaging script `tools/package-for-deployment.bash`.
+   - The script is location-independent, so you can do this from anywhere in the dyna3 repository.
+   - The call from the top level of the repository is:
+     ```bash
+     bash tools/package-for-deployment.bash
+     ```
+   - This will overwrite or replace the files in `deploy/dyna3`.
+3. Put the contents of `deploy/dyna3` in the folder on your server that the prototype will be served from.
+   - To simplify uploading, you might want to combine these files into an archive called `deploy/dyna3.zip`. Git has been set to ignore this path.

app-proto/Trunk.toml

@@ -0,0 +1,2 @@
+[build]
+public_url = "./"

deploy/.gitignore

@@ -0,0 +1,5 @@
+/dyna3.zip
+/dyna3/index.html
+/dyna3/dyna3-*.js
+/dyna3/dyna3-*.wasm
+/dyna3/main-*.css

tools/package-for-deployment.bash

@@ -0,0 +1,16 @@
+# set paths. this technique for getting the script location comes from
+# `mklement0` on Stack Overflow
+#
+#   https://stackoverflow.com/a/24114056
+#
+tools=$(dirname -- "$(readlink -f -- "$BASH_SOURCE")")
+src="$tools/../app-proto/dist"
+dest="$tools/../deploy/dyna3"
+
+# remove the old hash-named files
+[ -e "$dest"/dyna3-*.js ] && rm "$dest"/dyna3-*.js
+[ -e "$dest"/dyna3-*.wasm ] && rm "$dest"/dyna3-*.wasm
+[ -e "$dest"/main-*.css ] && rm "$dest"/main-*.css
+
+# copy the distribution
+cp -r "$src/." "$dest"