Fixup the just watch command

And add more docs about it.

justfile

@@ -9,26 +9,31 @@ install-frontend:
 clean-frontend:
   rm -rf ./static/js/*
 
-build-frontend: install-frontend clean-frontend
+build-frontend: clean-frontend
+  bun build frontend/index.ts \
+    --outdir ./static/js \
+    --entry-naming [name]-[hash].[ext] \
+    --minify
+
+build-dev-frontend: clean-frontend
   bun build frontend/index.ts \
     --outdir ./static/js \
     --entry-naming [name]-[hash].[ext]
+  touch .frontend-built # triggers watch-backend since static/* is ignored
 
 watch-frontend: install-frontend
   cargo watch -w frontend \
-    -s 'rm -rf ./static/js/*' \
-    -s 'bun build frontend/index.ts \
-    --outdir ./static/js \
-    --entry-naming [name]-[hash].[ext]' \
-    -s 'touch .frontend-built'
+    -s 'just build-dev-frontend'
 
 watch-backend:
   mold -run cargo watch \
     --ignore 'logs/*' \
     --ignore 'static/*' \
     --ignore 'frontend/*' \
+    --no-vcs-ignores \
     -x run
 
+# runs watch-frontend and watch-backend simultaneously
 watch:
  ./watch.sh