Using frozen pip3 for requirements now.

Signed-off-by: Marcel Parciak <marcel.parciak@gmail.com>

requirements.txt

-################################################################################
-# This requirements file has been automatically generated from `Pipfile` with
-# `pipenv-to-requirements`
-#
-#
-# This has been done to maintain backward compatibility with tools and services
-# that do not support `Pipfile` yet.
-#
-# Do NOT edit it directly, use `pipenv install [-d]` to modify `Pipfile` and
-# `Pipfile.lock` and then regenerate `requirements*.txt`.
-################################################################################
-
 alembic==1.4.2
+appdirs==1.4.4
 attrs==19.3.0
+black==19.10b0
 certifi==2020.6.20
 chardet==3.0.4
+click==7.1.2
 cloudant==2.13.0
+distlib==0.3.1
+fastapi==0.59.0
+filelock==3.0.12
+h11==0.9.0
+httptools==0.1.1
 idna==2.10
 iniconfig==1.0.0
-mako==1.1.3
-markupsafe==2.0.0a1
+iso8601==0.1.12
+Jinja2==3.0.0a1
+Mako==1.1.3
+MarkupSafe==2.0.0a1
 more-itertools==8.4.0
 packaging==20.4
+pathspec==0.8.0
+pbr==5.4.5
+pipenv==2020.6.2
+pipenv-to-requirements==0.9.0
 pluggy==0.13.1
 py==1.9.0
 pycdstar3 @ git+https://gitlab.gwdg.de/cdstar/pycdstar3@bde5c7ee604a74e8b20d770716a59310b8f19166#egg=pycdstar3
+pydantic==1.6
 pyparsing==3.0.0a2
 pytest==6.0.0rc1
 python-dateutil==2.8.1
 python-editor==1.0.4
+regex==2020.6.8
 requests==2.24.0
+requests-toolbelt==0.9.1
 six==1.15.0
-sqlalchemy==1.3.18
+SQLAlchemy==1.3.18
+starlette==0.13.4
+tabulate==0.8.7
 toml==0.10.1
+tqdm==4.48.0
+typed-ast==1.4.1
 urllib3==1.25.10
+uvicorn==0.11.5
+uvloop==0.14.0
+virtualenv==20.0.28
+virtualenv-clone==0.5.4
+websockets==8.1