feat: Add Docker for code debugging (#927)

* Update Dockerfile and docker-compose.yml

* Add Dockerfile for code debugging.
Add installation procedures of python, cpp and java.

Dockerfile

@@ -1,13 +1,14 @@
 FROM python:3.9.0-alpine
 
-RUN pip install -i https://pypi.tuna.tsinghua.edu.cn/simple --upgrade pip
-RUN pip install -i https://pypi.tuna.tsinghua.edu.cn/simple mkdocs-material==9.4.1 mkdocs-glightbox
+ENV PIP_INDEX_URL=https://pypi.tuna.tsinghua.edu.cn/simple
+RUN pip install --upgrade pip
+RUN pip install mkdocs-material==9.4.1 mkdocs-glightbox
 
-WORKDIR /app
+WORKDIR /hello-algo
 
-COPY docs /app/build/docs
-COPY overrides /app/build/overrides
-COPY mkdocs.yml /app/mkdocs.yml
+COPY docs ./build/docs
+COPY overrides ./build/overrides
+COPY mkdocs.yml ./mkdocs.yml
 
 RUN mkdocs build