Merge pull request #859 from heroku/dockerfile-update

Unpin Heroku 18 dockerfile dependencies

Author: CaseyFaist

CHANGELOG.md

@@ -2,7 +2,8 @@
 
 # Master
 
-Typo fixes
+- Unpin Heroku-18 binary build deps
+- Typo fixes
 
 --------------------------------------------------------------------------------
 

builds/heroku-18.Dockerfile

@@ -7,7 +7,7 @@ ENV WORKSPACE_DIR="/app/builds" \
     DEBIAN_FRONTEND=noninteractive \
     STACK="heroku-18"
 
-RUN apt-get update && apt-get install --no-install-recommends -y python-pip-whl=9.0.1-2 python-pip=9.0.1-2 python-setuptools python-wheel && rm -rf /var/lib/apt/lists/*
+RUN apt-get update && apt-get install -y python-pip && rm -rf /var/lib/apt/lists/*
 
 COPY requirements.txt /app/
 RUN pip install --disable-pip-version-check --no-cache-dir -r /app/requirements.txt