Add tests for plume webserver (#513)

* begin setup front-end test environment with selenium
* run migrations before tests
* use https for tests

script/run_browser_test.sh

@@ -0,0 +1,26 @@
+#!/bin/bash
+set -eo pipefail
+
+export ROCKET_SECRET_KEY="AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA="
+
+mkdir -p "target/cov/plume"
+mkdir -p "target/cov/plm"
+plm='kcov --exclude-pattern=/.cargo,/usr/lib --verify target/cov/plm plm'
+
+diesel migration run
+diesel migration redo
+$plm instance new -d plume-test.local -n plume-test
+$plm users new -n admin -N 'Admin' -e 'email@exemple.com' -p 'password'
+$plm search init
+
+kcov --exclude-pattern=/.cargo,/usr/lib --verify target/cov/plume plume &
+caddy -conf /Caddyfile &
+
+until curl http://localhost:7878/test/health -f; do sleep 1; done 2>/dev/null >/dev/null
+
+cd $(dirname $0)/browser_test/
+python3 -m unittest *.py
+
+kill -SIGINT  %1
+kill -SIGKILL %2
+wait