Added nodemon as a dev dependency and removed unnecessary instructions from the Dockerfile

Dockerfile

@@ -3,13 +3,9 @@
 FROM docker.io/library/node:18-alpine AS build_node_modules
 
 # Copy Web UI
-COPY src/ /app/
+COPY src /app
 WORKDIR /app
 RUN npm ci --omit=dev &&\
-    # Enable this to run `npm run serve`
-    npm i -g nodemon &&\
-    # Delete unnecessary files 
-    npm cache clean --force && rm -rf ~/.npm &&\
     mv node_modules /node_modules
 
 # Copy build result to a new image.