Remove default post and add make target to render blog

Makefile

@@ -1,5 +1,7 @@
-public:
+public: favicon.ico source
 	npx hexo generate
+	cp -r node_modules/mathjax/es5 public/mathjax
+	cp favicon.ico public/
 
 favicon.ico: favicon.svg
 	rsvg-convert -w 16 -h 16 --background-color=none favicon.svg -o favicon-16.png

source/_posts/hello-world.md

@@ -1,38 +0,0 @@
----
-title: Hello World
----
-Welcome to [Hexo](https://hexo.io/)! This is your very first post. Check [documentation](https://hexo.io/docs/) for more info. If you get any problems when using Hexo, you can find the answer in [troubleshooting](https://hexo.io/docs/troubleshooting.html) or you can ask me on [GitHub](https://github.com/hexojs/hexo/issues).
-
-## Quick Start
-
-### Create a new post
-
-``` bash
-$ hexo new "My New Post"
-```
-
-More info: [Writing](https://hexo.io/docs/writing.html)
-
-### Run server
-
-``` bash
-$ hexo server
-```
-
-More info: [Server](https://hexo.io/docs/server.html)
-
-### Generate static files
-
-``` bash
-$ hexo generate
-```
-
-More info: [Generating](https://hexo.io/docs/generating.html)
-
-### Deploy to remote sites
-
-``` bash
-$ hexo deploy
-```
-
-More info: [Deployment](https://hexo.io/docs/deployment.html)