Add deploy script

deploy.sh

@@ -0,0 +1,21 @@
+#!/bin/sh
+set -eo pipefail
+
+if [ git status --porcelain=2 -uno | grep '' ]; then
+    echo "You have unstaged changes."
+    echo "This shouldn't happen in production."
+    echo "Plsfix. Dank."
+    exit 1
+fi
+
+echo "Pulling from remote."
+git pull
+
+echo "Updating dependencies."
+~/env/bin/pip install requirements.txt
+
+echo "Migrating database."
+~/env/bin/flask db upgrade
+
+echo "Restarting server using passenger."
+passenger-config restart-app .