message: use overrides instead of overwrite
diff: @@ -242,7 +242,7 @@ if [[ ( "$BUILD_TYPE" == "pullrequest" || "$BUILD_TYPE" == "branch" ) && ! $TH
  DOCKERFILE=$(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.$IMAGE_NAME.build.dockerfile false)
  + ENVIRONMENT_DOCKERFILE_OVERRIDE=$(cat .lagoon.yml | shyaml get-value environments.${BRANCH//./\\.}.overrides.$IMAGE_NAME.build.dockerfile false)
  if [ ! $ENVIRONMENT_DOCKERFILE_OVERRIDE == "false" ]; then
  DOCKERFILE=$ENVIRONMENT_DOCKERFILE_OVERRIDE
  fi
  @@ -259,7 +259,7 @@ if [[ ( "$BUILD_TYPE" == "pullrequest" || "$BUILD_TYPE" == "branch" ) && ! $TH
  OVERRIDE_IMAGE=$(cat $DOCKER_COMPOSE_YAML | shyaml get-value services.$IMAGE_NAME.labels.lagoon\\.image false)
  # allow to overwrite image that we pull for this environment and service
  - ENVIRONMENT_IMAGE_OVERRIDE=$(cat .lagoon.yml | shyaml get-value environments.${BRANCH//./\\.}.overwrites.$IMAGE_NAME.image false)
  + ENVIRONMENT_IMAGE_OVERRIDE=$(cat .lagoon.yml | shyaml get-value environments.${BRANCH//./\\.}.overrides.$IMAGE_NAME.image false)
  if [ ! $ENVIRONMENT_IMAGE_OVERRIDE == "false" ]; then
  OVERRIDE_IMAGE=$ENVIRONMENT_IMAGE_OVERRIDE
  fi
  @@ -285,7 +285,7 @@ if [[ ( "$BUILD_TYPE" == "pullrequest" || "$BUILD_TYPE" == "branch" ) && ! $TH
  BUILD_CONTEXT=$(cat $DOCKER_COMPOSE_YAML | shyaml get-value services.$IMAGE_NAME.build.context .)
  # allow to overwrite build context for this environment and service
  - ENVIRONMENT_BUILD_CONTEXT_OVERRIDE=$(cat .lagoon.yml | shyaml get-value environments.${BRANCH//./\\.}.overwrites.$IMAGE_NAME.build.context false)
  + ENVIRONMENT_BUILD_CONTEXT_OVERRIDE=$(cat .lagoon.yml | shyaml get-value environments.${BRANCH//./\\.}.overrides.$IMAGE_NAME.build.context false)
  if [ ! $ENVIRONMENT_BUILD_CONTEXT_OVERRIDE == "false" ]; then
  BUILD_CONTEXT=$ENVIRONMENT_BUILD_CONTEXT_OVERRIDE
  fi
  