Remove manual build step

Run `npm run build` while building the container. The compiled artifact
is removed from the checked-in code, and added to .gitignore.

Bug: T396991
Change-Id: I5dbb1da8561ef44384afe84319eb6dfb168123f8

Author: siddharthvp

.dockerignore

@@ -1,2 +1,3 @@
 Dockerfile
-docker-compose.yml
+docker-compose.yml
+node_modules

.gitignore

@@ -20,3 +20,4 @@ terraform.tfstate*
 .terraform*
 tofu/kube.config
 ansible/collections/*
+quarry/web/static/templates/compiled.js

Dockerfile

@@ -17,9 +17,22 @@ RUN pip install --break-system-packages --upgrade pip==24.0 wheel && \
     pip install --break-system-packages -r requirements.txt
 
 # Copy app code
-USER quarry
 COPY . /app
 
+# Build JS assets
+RUN apt-get update &&  \
+    apt-get install -y nodejs npm && \
+    NODE_ENV=production npm ci && \
+    npm run build && \
+    # Once the build is run, dependencies are no longer needed, delete them
+    # to keep image small
+    rm -rf node_modules &&  \
+    apt-get remove -y nodejs npm && \
+    apt-get autoremove -y && \
+    rm -rf /var/lib/apt/lists/*
+
+USER quarry
+
 # Expose port for web server
 EXPOSE 5000