fix(build): Added npm build in dockerfile

Dockerfile

@@ -1,3 +1,10 @@
+FROM node:14.0-slim AS appjs-builder
+WORKDIR /app
+COPY app/package.json app/package-lock.json ./
+RUN npm install
+COPY app .
+RUN npm run build
+
 FROM python:3.11-slim
 
 WORKDIR /
@@ -23,6 +30,9 @@ WORKDIR /
 # copy pre-built packages to this image
 COPY --from=0 /usr/local/lib/python3.11/site-packages /usr/local/lib/python3.11/site-packages
 
+# Copy the built JS files from the appjs-builder stage
+COPY --from=appjs-builder /app/static/build /kube_ops_view/static/build
+
 # now copy the actual code we will execute (poetry install above was just for dependencies)
 COPY kube_ops_view /kube_ops_view