Add missing newline

Author: razor-x

.devcontainer/Dockerfile

@@ -14,4 +14,5 @@ WORKDIR /home/node
 RUN mkdir -p .config/git \
  && echo ".vscode/*" >> .config/git/ignore \
  && echo "*.code-workspace" >> .config/git/ignore \
- && echo ".history/" >> .config/git/ignore
+ && echo ".history/" >> .config/git/ignore
+