transactions endpoints and pytests (#6)

ci: set app_port to 8000

build: set virtualenvs.create false

build: fix dockerfile and test to make it work

build: try to make application startup

build: Download the 'stopwords' resource before running the app

build: switch to using pip

build: fix backend dockerfile

build: fix dockerfile

build: fix Dockerfile to try to get the app to build

feat: repo setup