add Cedar 14 environment back for tests and binaries

Author: CaseyFaist

Makefile

@@ -9,13 +9,21 @@ check:
 	@shellcheck -x bin/steps/hooks/*
 
 test-staging:
-	@echo "Running tests against staged binaries..."
+	@echo "Running tests against staged binaries (cedar-14)..."
+	@docker run -v $(shell pwd):/buildpack:ro --rm -it -e "STACK=cedar-14" -e "TEST_STAGED_S3_BINARIES=1" heroku/cedar-14 bash -c 'cp -r /buildpack /buildpack_test; cd /buildpack_test/; test/run;'
+	@echo ""
+	@echo "Running tests against staged binaries (heroku-16)..."
 	@docker run -v $(shell pwd):/buildpack:ro --rm -it -e "STACK=heroku-16" -e "TEST_STAGED_S3_BINARIES=1" heroku/heroku:16-build bash -c 'cp -r /buildpack /buildpack_test; cd /buildpack_test/; test/run;'
 	@echo ""
-	@echo "Running tests in docker (heroku-18)..."
+	@echo "Running tests against staged binaries (heroku-18)..."
 	@docker run -v $(shell pwd):/buildpack:ro --rm -it -e "STACK=heroku-18" -e "TEST_STAGED_S3_BINARIES=1" heroku/heroku:18-build bash -c 'cp -r /buildpack /buildpack_test; cd /buildpack_test/; test/run;'
 	@echo ""
 
+test-cedar-14:
+	@echo "Running tests in docker (cedar-14)..."
+	@docker run -v $(shell pwd):/buildpack:ro --rm -it -e "STACK=cedar-14" heroku/cedar-14 bash -c 'cp -r /buildpack /buildpack_test; cd /buildpack_test/; test/run;'
+	@echo ""
+
 test-heroku-16:
 	@echo "Running tests in docker (heroku-16)..."
 	@docker run -v $(shell pwd):/buildpack:ro --rm -it -e "STACK=heroku-16" heroku/heroku:16-build bash -c 'cp -r /buildpack /buildpack_test; cd /buildpack_test/; test/run;'

builds/cedar-14.Dockerfile

@@ -10,6 +10,6 @@ ENV WORKSPACE_DIR="/app/builds" \
 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
+RUN pip install -r /app/requirements.txt
 
 COPY . /app