* add feather asset from opensymbols
([url](https://www.opensymbols.org/symbols/language-craft/feather-b135df39?id=44015))
* update routes/login.py to use new feather.webp emoji
* update seed-db.sql to add feather emoji
Co-authored-by: Motte Lurk <mottelurk@proton.me>
Co-authored-by: Ben Rog-Wilhelm <zorba@pavlovian.net>
On unmodified themotte, try creating a submission with
```html
<img src="/doesnotexist.png" onerror="alert(1)" />
```
and observe that your browser opens an alert window.
* #39 Add Flask-Migrate dep
* #39 Make it such that flask db init can run
https://github.com/miguelgrinberg/Flask-Migrate/issues/196#issuecomment-381343393
* Run flask db init, update migrations.env, commit artifacts
* Set up a script such that you can `docker-compose exec files bash -c 'cd /service; FLASK_APP="files/cli:app" flask '` and have it do whatever flask thing you want
* Fix circular dependency
* import * is evil
* Initial alembic migration, has issues with constraints and nullable columns
* Bring alts table up to date with alembic autogenerate
* Rerun flask db revision autogenerate
* Bring award_relationships table up to date with alembic autogenerate
* [#39/alembic] files/classes/__init__.py is evil but is at least explicitly evil now
* #39 fix model in files/classes/badges.py
* #39 fix model in files/classes/domains.py and files/classes/clients.py
* #39 fix models: comment saves, comment flags
* #39 fix models: comments
* Few more imports
* #39 columns that are not nullable should be flagged as not nullable
* #39 Add missing indexes to model defs
* [#39] add missing unique constraints to model defs
* [#39] Temporarily undo any model changes which cause the sqlalchemy model to be out of sync with the actual dump
* #39 Deforeignkeyify the correct column to make alembic happy
* #39 flask db revision --autogenerate now creates an empty migration
* #39 Migration format such that files are listed in creation order
* #39 Better first revision
* #39 Revert the model changes that were required to get to zero differences between db revision --autogenerate and the existing schema
* #39 The first real migration
* #39 Ensure that foreign key constraints are named in migration
* #39 Alembic migrations for FK constraints, column defs
* [#39] Run DB migrations before starting tests
* [#39] New test to ensure migrations are up to date
* [#39] More descriptive test failure message
* Add -T flag to docker-compose exec
* [#39] Run alembic migrations when starting the container
