Fix the typo for the dir name of BuilderLibrary

Fix the typo for the dir name of BuilderLibrary

Dockerfile

 WORKDIR /BrickUp-Docker-API-Service
 COPY . .
 RUN npm i
-WORKDIR libs/Builderlibrary/
+WORKDIR libs/BuilderLibrary/
 RUN npm i
 WORKDIR /BrickUp-Docker-API-Service/
 CMD ["node", "app.js", "&"]