• Clone the repo and cd to it
• pyvenv-3.5 .venv
• pip install -r requirements.txt
• pip install -e .
• npm install
• cp gsweb/defaults.cfg gsweb.cfg
• Set a SECRET_KEY in gsweb.cfg and change SQLALCHEMY_DATABASE_URI if necessary
• Create a Postgres database, e.g. using createdb gsweb

• Install eslint and sass-lint so it's in your PATH (e.g. sudo npm install -g eslint sass-lint)
• pip install pep8
• ln -sr pre-commit.githook .git/hooks/pre-commit

If you do not want to install eslint globally you can also install it locally, copy the git hook instead of symlinking it and point the ESLINT_CMD variable in the script to the local eslint (e.g. node_modules/.bin/eslint).
The same applies to sass-lint (SASSLINT_CMD)

• export FLASK_APP=gsweb._cliapp FLASK_DEBUG=1 GSWEB_CONFIG=/path/to/your/gsweb.cfg
• flask createdb (creates tables in the database)
• flask gulp (monitors and rebuilds assets)
• flask run --with-threads