Refactor Dockerfile to source nvm.sh using dot operator

Author: cbluebird

Language/node.js/22/Dockerfile

@@ -14,7 +14,7 @@ RUN apt-get update && \
     echo "export NVM_DIR=$NVM_DIR" >> /etc/profile.d/nvm.sh && \
     echo "[ -s $NVM_DIR/nvm.sh ] && . $NVM_DIR/nvm.sh" >> /etc/profile.d/nvm.sh && \
     echo "[ -s $NVM_DIR/bash_completion ] && . $NVM_DIR/bash_completion" >> /etc/profile.d/nvm.sh && \
-    source /etc/profile.d/nvm.sh && \
+    . /etc/profile.d/nvm.sh && \
     nvm install 22 && \
     nvm use 22 && \
     npm install -g typescript yarn pnpm && \