Add build for sourcehut

.build.yml

@@ -0,0 +1,21 @@
+image: debian/latest
+oauth: pages.sr.ht/PAGES:RW
+environment:
+  site: huyngo.srht.site
+tasks:
+- install: |
+    sudo apt install ruby-full golang
+    gem install jekyll bundler
+    git clone https://git.sr.ht/~sircmpwn/openring
+    cd openring
+    go build -o openring
+    sudo cp openring /usr/local/bin/
+- package: |
+    cd $site
+    ./create-webring.sh
+    bundle update
+    bundle exec jekyll build
+    cd _site
+    tar -cvz . > ../../site.tar.gz
+- upload: |
+    acurl -f https://pages.sr.ht/publish/$site -Fcontent=@site.tar.gz