adding the triton docker build minimal example (#242)

examples/usage/triton/Dockerfile

@@ -0,0 +1,10 @@
+FROM nvcr.io/nvidia/tritonserver:24.01-py3
+
+WORKDIR /opt
+
+RUN git clone https://github.com/sgl-project/sglang.git
+
+WORKDIR /opt/sglang
+RUN pip install --upgrade pip && \
+    pip install -e "python[all]" && \
+    pip install datasets