Error running script in Helm pre-install hook - script not found - kubernetes

Question

I have defined a Helm pre-install hook in one of my microservices, to create a user, database and several tables in PostgreSQL before the service is started for the first time. My pre-install.yaml file is:
apiVersion: batch/v1
kind: Job
metadata:
name: psql-init-job
labels:
app.kubernetes.io/managed-by: {{ .Release.Service | quote }}
app.kubernetes.io/instance: {{ .Release.Name | quote }}
app.kubernetes.io/version: {{ .Chart.AppVersion }}
helm.sh/chart: "{{ .Chart.Name }}-{{ .Chart.Version }}"
annotations:
# This is what defines this resource as a hook. Without this line, the
# job is considered part of the release.
"helm.sh/hook": pre-install
"helm.sh/hook-weight": "5"
"helm.sh/hook-delete-policy": hook-succeeded
# hook-succeeded, hook-failed
spec:
template:
metaData:
name: psql-init-job
labels:
app.kubernetes.io/managed-by: {{ .Release.Service | quote }}
app.kubernetes.io/instance: {{ .Release.Name | quote }}
helm.sh/chart: "{{ .Chart.Name }}-{{ .Chart.Version }}"
spec:
restartPolicy: Never
containers:
- name: psql-init-job
image: registry.local:5000/sandbox/init-pgsql:1.0.0
imagePullPolicy: "IfNotPresent"
command: ["/bin/sh", "-c", "/k8s-init.sh" ]
env:
- name: DATABASE_HOST
value: psql-postgresql.svc.cluster.local
- name: DATABASE_PORT
value: "5432"
- name: DATABASE_WAIT_TIME
value: "60s"
backoffLimit: 0
The Dockerfile includes:
# Copy the SQL script.
COPY ./docker/pgsql/psql/k8s-init.sh /k8s-init.sh
# Copy the SQL files.
COPY ./docker/pgsql/psql/k8s-init-postgres.sql /k8s-init-postgres.sql
COPY ./docker/pgsql/psql/k8s-init-test.sql /k8s-init-test.sql
The script that it's trying to run is:
#!/bin/sh
# Import the SQL files.
pg_restore -d postgres://username:password#psql-postgresql.svc.cluster.local:5432/postgres --jobs 4 /k8s-init-postgres.sql
pg_restore -d postgres://username:password#psql-postgresql.svc.cluster.local:5432/test --jobs 4 /k8s-init-test.sql
When I install the Helm chart that contains the pre-install hook, I get a startError from the microservice's pod:
/bin/sh: /k8s-init.sh: not found
Any idea why it can't find the k8s-init.sh script?