$ forester init > /dev/null

  $ echo 'fake png' > assets/pic.png

  $ cat > trees/index.tree << EOF
  > \title{HTTP server test}
  > \<html:img>[src]{\route-asset{assets/pic.png}}{}
  > EOF
  $ forester start --no-browser &
  Forester is running on http://localhost:8080
  $ SERVER_PID=$!
  $ curl -s --retry 5 --retry-connrefused http://localhost:8080 > response.html
  $ cat response.html | grep -Fo 'HTTP server test'
  HTTP server test
  HTTP server test
  HTTP server test
  HTTP server test
  HTTP server test
  $ tr '\n' ' ' < response.html | grep -Fo '<img xmlns:html="http://www.w3.org/1999/xhtml" src="/preview/'
  <img xmlns:html="http://www.w3.org/1999/xhtml" src="/preview/

  $ curl -s http://localhost:8080/preview/index/ | tr '\n' ' ' | grep -oE '<meta property="og:image" [^>]*>'
  <meta property="og:image" content="http://localhost:8080/og-image.png">

The json manifest is available:

  $ curl -s http://localhost:8080/forest.json | grep -Fo '"title":"HTTP server test"'
  "title":"HTTP server test"

Links in the manifest are routed to preview:
  $ curl -s http://localhost:8080/forest.json | grep -Fo '/preview/index/'
  /preview/index/

The docs are routed like any other foreign forest

  $ curl -s --retry 5 --retry-connrefused http://localhost:8080/preview/foreign/forester-notes.org/index/ | grep -o "maintained by"
  maintained by
  maintained by

Assets are available:
  $ curl -s -H "Hx-Request: true" http://localhost:8080/home > home.html
  $ ASSET_SRC=$(grep -oE '/preview/[a-z0-9]+\.png' home.html)
  $ curl -s http://localhost:8080$ASSET_SRC
  fake png
  $ curl -s -o /dev/null -w '%{content_type}\n' http://localhost:8080$ASSET_SRC
  image/png

  $ kill $SERVER_PID
  $ wait $SERVER_PID 2>/dev/null || true