Update README.md (#66)

Add gem mirror doc for gem/web beginner like me..

Author: tpoisonooo

README.md

@@ -26,10 +26,10 @@ Besides supporting WebGPU, this project also provides the harness for other kind
 
 ## Instructions for local deployment
 
-1. Install TVM Unity. 
+1. Install TVM Unity. Open [mlc.ai wheels](https://mlc.ai/wheels) for more version.
 
     ```shell
-    pip3 install mlc-ai-nightly -f https://mlc.ai/wheels
+    pip3 install -r requirements.txt
     ```
 
 2. Install all the prerequisite for web deployment:
@@ -39,7 +39,7 @@ Besides supporting WebGPU, this project also provides the harness for other kind
     2. [Rust](https://www.rust-lang.org/tools/install).
     3. [`wasm-pack`](https://rustwasm.github.io/wasm-pack/installer/). It helps build Rust-generated WebAssembly, which used for tokenizer in our case here.
     4. Install jekyll by following the [official guides](https://jekyllrb.com/docs/installation/). It is the package we use for website.
-    5. Install jekyll-remote-theme by command
+    5. Install jekyll-remote-theme by command. Try [gem mirror](https://gems.ruby-china.com/) if install blocked.
         ```shell
         gem install jekyll-remote-theme
         ```

requirements.txt

@@ -0,0 +1,5 @@
+mlc-ai-nightly
+pytest
+typing_extensions
+
+-f https://mlc.ai/wheels