Improve local development script

- Avoid running `npm install` on every execution
- Add a separate `install` task that runs `npm clean-install`

CONTRIBUTING.md

@@ -3,8 +3,9 @@
 The `build` script in the project root provides a convenient way to perform many local build tasks:
 1. `./build` will lint and compile typescript sources
 2. `./build all` will lint and compile typescript and run unit tests
-3. `./build init-scripts` will run the init-script integration tests
-4. `./build act <act-commands>` will run `act` after building local changes (see below)
+3. `./build install` will install npm packages followed by lint and compile
+4. `./build init-scripts` will run the init-script integration tests
+5. `./build act <act-commands>` will run `act` after building local changes (see below)
 
 ## Using `act` to run integ-test workflows locally
 

build

@@ -4,12 +4,10 @@ cd sources
 
 case "$1" in
     all)
-        npm clean-install
         npm run all
         ;;
     act)
         # Build and copy outputs to the dist directory
-        npm install
         npm run build
         cd ..
         cp -r sources/dist .
@@ -18,18 +16,21 @@ case "$1" in
         # Revert the changes to the dist directory
         git checkout -- dist
         ;;
+    dist)
+        npm clean-install
+        npm run build
+        cd ..
+        cp -r sources/dist .
+        ;;
     init-scripts)
         cd test/init-scripts
         ./gradlew check
         ;;
-    dist)
-        npm install
+    install)
+        npm clean-install
         npm run build
-        cd ..
-        cp -r sources/dist .
         ;;
     *)
-        npm install
         npm run build
         ;;
 esac