Put back requirements.txt

.dockerignore

@@ -38,4 +38,3 @@ build/
 ### Git repo
 .git*
 *.md
-requirements.txt

Dockerfile

@@ -10,6 +10,7 @@ RUN apk upgrade --no-cache \
                        libffi libffi-dev \
  && python -m venv venv \
  && . ./venv/bin/activate \
+ && pip install -r requirements.txt \
  && pip install -e .
 
 # ===