Add python3-bcrypt to the toolkit

Needed to bcrypt hash passwords for postgresql

For example:

  python3 -c "import bcrypt; print(bcrypt.hashpw('password'.encode('utf-8'), bcrypt.gensalt()).decode())"

toolkit/Dockerfile

@@ -11,6 +11,7 @@ RUN apt-get -qq -y update && \
       jq \
       less \
       sudo \
+      python3-bcrypt \
       && apt-get clean \
       && rm -rf /var/cache/apt/archives /var/lib/apt/lists/*