Merge pull request #57 from aabadie/pyyaml

Dockerfile: add PyYaml Python package

Author: maribu

Dockerfile

@@ -25,7 +25,8 @@ RUN python3 -m pip install --upgrade pip && \
     python3 -m pip install \
         dwq==0.0.56 \
         orjson==3.6.6 \
-        requests==2.27.1
+        requests==2.27.1 \
+        PyYAML==6.0.1
 
 # get git-cache directly from github
 RUN wget https://raw.githubusercontent.com/kaspar030/git-cache/f76c3a5f0e15f08c28e53fb037755f29f0b76d88/git-cache \