Make the .npm directory writable by the root group (#1256)

Signed-off-by: Landon LaSmith <LLaSmith@redhat.com>

Dockerfile

@@ -17,7 +17,7 @@ COPY --chown=default:root ${SOURCE_CODE} /usr/src/app
 # Change file ownership to the assemble user
 USER default
 
-RUN npm cache clean --force 
+RUN npm cache clean --force
 
 RUN npm ci --omit=optional
 
@@ -39,7 +39,7 @@ COPY --chown=default:root --from=builder /usr/src/app/.npmrc /usr/src/app/backen
 COPY --chown=default:root --from=builder /usr/src/app/.env /usr/src/app/.env
 COPY --chown=default:root --from=builder /usr/src/app/data /usr/src/app/data
 
-RUN cd backend && npm cache clean --force && npm ci --omit=dev --omit=optional
+RUN cd backend && npm cache clean --force && npm ci --omit=dev --omit=optional && chmod -R g+w /opt/app-root/src/.npm
 
 WORKDIR /usr/src/app/backend