Fix unhealthy docker containers (#574)

* Add curl to brickfix dockerfile.

* Add curl to AccountManager docker.

* Fix issue preventing container from building.

docker/brickfix.Dockerfile

@@ -1,5 +1,7 @@
 # syntax=docker/dockerfile:1
 FROM python:3.9.9-slim
+RUN apt-get update && \
+    apt-get install curl -y
 WORKDIR /empty_dir
 EXPOSE 80
 CMD python -m http.server 80