Added link to source code and a deployment script.

Makefile

@@ -0,0 +1,7 @@
+.PHONY: default
+default:
+	@echo "Usage: make [task]"
+
+.PHONY: deploy
+deploy:
+	scp index.html tilde.town:public_html/

index.html

@@ -596,6 +596,8 @@ input#theme-bow:checked ~ main > .block > .column > .int.i-tri {
         <label class="change-theme for-theme-bow" for="theme-bow">
             Black on white
         </label>
+        <h2>About</h2>
+        <p><a href="https://tildegit.org/emilis/harmonorasi">Source code</a></p>
     </aside>
     <main>
         <input type="checkbox" id="c-a">