refactor: standardize apt-get usage

- Always put flags in same location
- Always use apt-get
- Add --no-install-recommends where possible

tests/ci/setup.sh

@@ -28,8 +28,8 @@ install_dependencies() {
   curl -L "https://packagecloud.io/dokku/dokku/packages/ubuntu/bionic/procfile-util_${PROCFILE_VERSION}_amd64.deb/download.deb" -o "$ROOT_DIR/build/${PROCFILE_UTIL_PACKAGE_NAME}"
 
   sudo add-apt-repository -y ppa:nginx/stable
-  sudo apt-get update
-  sudo apt-get -qq -y install cgroupfs-mount dos2unix jq nginx
+  sudo apt-get update -qq
+  sudo apt-get -qq -y --no-install-recommends install cgroupfs-mount dos2unix jq nginx
   sudo cp "${ROOT_DIR}/tests/dhparam.pem" /etc/nginx/dhparam.pem
 
   sudo dpkg -i "${ROOT_DIR}/build/$HEROKUISH_PACKAGE_NAME" \