Use relative output path

After upgrading Nx from 16 to 18, the output
path behavior changed from absolute to relative.
Although no evidence was found in the changelogs,
the change in behavior is proven by experimenting.

Dockerfile

@@ -4,7 +4,8 @@ COPY . .
 ARG ENVIRONMENT=production
 RUN npm run remove-unneeded-deps && \
     npm install && \
-    npm run build hpc-cdm -- --output-path=/srv/src/dist --configuration=$ENVIRONMENT
+    # Output path is relative to working directory
+    npm run build hpc-cdm -- --output-path=dist/ --configuration=$ENVIRONMENT
 
 FROM public.ecr.aws/unocha/nginx:stable-beagle