build(docker): ensure public dir exists before copying in build stage

Creates the public directory to prevent COPY failures when no public assets are present in the app.

Author: LarryMerino

Dockerfile

@@ -24,6 +24,9 @@ WORKDIR /app
 COPY --from=deps /app/node_modules ./node_modules
 COPY . .
 
+# Ensure the public directory exists so the later COPY does not fail when the app has no public assets yet
+RUN mkdir -p public
+
 # Next.js collects completely anonymous telemetry data about general usage.
 # Learn more here: https://nextjs.org/telemetry
 # Uncomment the following line in case you want to disable telemetry during the build.