chore: add logging section to readme (#1018)

* chore: add logging section to readme

Source-Link: googleapis/synthtool@d1011bc
Post-Processor: gcr.io/cloud-devrel-public-resources/owlbot-python:latest@sha256:fdc038572b896f739f95cc90e62f16c06e4f2ef0ef3bea343a358331862ad0f0

* 🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

---------

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>
Co-authored-by: Daniel Sanche <[email protected]>

Author: gcf-owl-bot[bot]

packages/google-cloud-firestore/.github/.OwlBot.lock.yaml

@@ -13,5 +13,5 @@
 # limitations under the License.
 docker:
   image: gcr.io/cloud-devrel-public-resources/owlbot-python:latest
-  digest: sha256:f016446d6e520e5fb552c45b110cba3f217bffdd3d06bdddd076e9e6d13266cf
-# created: 2025-02-21T19:32:52.01306189Z
+  digest: sha256:fdc038572b896f739f95cc90e62f16c06e4f2ef0ef3bea343a358331862ad0f0
+# created: 2025-02-13T21:06:55.521673457Z

packages/google-cloud-firestore/.kokoro/build.sh

@@ -15,13 +15,11 @@
 
 set -eo pipefail
 
-CURRENT_DIR=$(dirname "${BASH_SOURCE[0]}")
-
 if [[ -z "${PROJECT_ROOT:-}" ]]; then
-  PROJECT_ROOT=$(realpath "${CURRENT_DIR}/..")
+    PROJECT_ROOT="github/python-firestore"
 fi
 
-pushd "${PROJECT_ROOT}"
+cd "${PROJECT_ROOT}"
 
 # Disable buffering, so that the logs stream through.
 export PYTHONUNBUFFERED=1
@@ -33,16 +31,10 @@ env | grep KOKORO
 export FIRESTORE_APPLICATION_CREDENTIALS=${KOKORO_GFILE_DIR}/firebase-credentials.json
 
 # Setup service account credentials.
-if [[ -f "${KOKORO_GFILE_DIR}/service-account.json" ]]
-then
-  export GOOGLE_APPLICATION_CREDENTIALS=${KOKORO_GFILE_DIR}/service-account.json
-fi
+export GOOGLE_APPLICATION_CREDENTIALS=${KOKORO_GFILE_DIR}/service-account.json
 
 # Setup project id.
-if [[ -f "${KOKORO_GFILE_DIR}/project-id.json" ]]
-then
-  export PROJECT_ID=$(cat "${KOKORO_GFILE_DIR}/project-id.json")
-fi
+export PROJECT_ID=$(cat "${KOKORO_GFILE_DIR}/project-id.json")
 
 # If this is a continuous build, send the test log to the FlakyBot.
 # See https://github.com/googleapis/repo-automation-bots/tree/main/packages/flakybot.
@@ -57,7 +49,7 @@ fi
 # If NOX_SESSION is set, it only runs the specified session,
 # otherwise run all the sessions.
 if [[ -n "${NOX_SESSION:-}" ]]; then
-  python3 -m nox -s ${NOX_SESSION:-}
+    python3 -m nox -s ${NOX_SESSION:-}
 else
-  python3 -m nox
+    python3 -m nox
 fi