Start using sinatra & ruby for backend

Signed-off-by: Syed Daanish <me@syedm.dev>

run.fish

@@ -0,0 +1,31 @@
+set pipe_path /tmp/infin
+set oldsum (cat (find . -name '*.rb' | sort) | md5sum)
+if not test -p infinsweeper.db
+  sqlite3 infinsweeper.db < schema.sql
+end
+pkill ruby
+ruby main.rb -p8080 &
+if not test -p $pipe_path
+  touch $pipe_path
+end
+while true
+  sleep 1
+  set newsum (cat (find . -name '*.rb' | sort) | md5sum)
+  if test "$oldsum" != "$newsum"
+    set oldsum $newsum
+    pkill ruby
+    ruby main.rb -p8080 &
+  end
+  if set line (cat $pipe_path)
+    echo $line
+    if test "$line" = "die"
+      pkill ruby
+      echo "" > $pipe_path
+      exit
+    end
+    if test "$line" = "open"
+      echo "" > $pipe_path
+      xdg-open http://localhost:8080
+    end
+  end
+end