message: take envirnment overwrite for dockerfile into consideration
diff: @@ -240,6 +240,13 @@ if [[ ( "$BUILD_TYPE" == "pullrequest" || "$BUILD_TYPE" == "branch" ) && ! $TH
  do
  DOCKERFILE=$(cat $DOCKER_COMPOSE_YAML | shyaml get-value services.$IMAGE_NAME.build.dockerfile false)
  +
  + # allow to overwrite build dockerfile for this environment and service
  + ENVIRONMENT_DOCKERFILE_OVERRIDE=$(cat .lagoon.yml | shyaml get-value environments.${BRANCH//./\\.}.overwrites.$SERVICE_NAME.build.dockerfile false)
  + if [ ! $ENVIRONMENT_DOCKERFILE_OVERRIDE == "false" ]; then
  + DOCKERFILE=$ENVIRONMENT_DOCKERFILE_OVERRIDE
  + fi
  +
  if [ $DOCKERFILE == "false" ]; then
  # No Dockerfile defined, assuming to download the Image directly
  @@ -268,12 +275,6 @@ if [[ ( "$BUILD_TYPE" == "pullrequest" || "$BUILD_TYPE" == "branch" ) && ! $TH
  else
  # Dockerfile defined, load the context and build it
  - # allow to overwrite build dockerfile for this environment and service
  - ENVIRONMENT_DOCKERFILE_OVERRIDE=$(cat .lagoon.yml | shyaml get-value environments.${BRANCH//./\\.}.overwrites.$SERVICE_NAME.build.dockerfile false)
  - if [ ! $ENVIRONMENT_DOCKERFILE_OVERRIDE == "false" ]; then
  - DOCKERFILE=$ENVIRONMENT_DOCKERFILE_OVERRIDE
  - fi
  -
  # We need the Image Name uppercase sometimes, so we create that here
  IMAGE_NAME_UPPERCASE=$(echo "$IMAGE_NAME" | tr '[:lower:]' '[:upper:]')
  