Merge branch '41-commandconnectorerror-error-running-pg_dump-passbook-host-passbook-postgresql-username-pos' into 'master'

Resolve "CommandConnectorError: Error running:  pg_dump passbook --host=passbook-postgresql --username=pos..."

Closes #41

See merge request BeryJu.org/passbook!30

base.Dockerfile

@@ -16,5 +16,8 @@ COPY --from=locker /app/requirements-dev.txt /app/
 
 WORKDIR /app/
 
-RUN pip install -r requirements.txt  --no-cache-dir && \
+RUN apt-get update && \
+    apt-get install -y --no-install-recommends postgresql-client-11 && \
+    rm -rf /var/lib/apt/ && \
+    pip install -r requirements.txt  --no-cache-dir && \
     adduser --system --no-create-home --uid 1000 --group --home /app passbook

helm/passbook/requirements.yaml

@@ -1,6 +1,6 @@
 dependencies:
 - name: postgresql
-  version: 4.2.2
+  version: 6.3.13
   repository: https://kubernetes-charts.storage.googleapis.com/
 - name: redis
   version: 9.2.1