Docker: run script : ERROR: Unable to lock database: Permission denied - postgresql

Question

Hello I'm trying to run a script to just start my yarn dev after my postgres is connected:
until psql -c '\l'; do
echo >&2 "$(date +%Y%m%dt%H%M%S) Postgres is unavailable - sleeping"
sleep 1
done
echo >&2 "$(date +%Y%m%dt%H%M%S) Postgres is up - executing command"
exec ${#}
docker file:
#building code
FROM node:lts-alpine
RUN mkdir -p /home/node/api && chown -R node:node /home/node/api
WORKDIR /home/node/api
COPY ormconfig.json .env package.json yarn.* ./
USER node
RUN yarn
COPY --chown=node:node . .
RUN apk add --no-cache openssl
COPY wait-pg.sh ./
RUN chmod +x /wait-pg.sh
ENTRYPOINT ["/wait-pg.sh"]
EXPOSE 4000
CMD ["yarn", "dev"]
docker compose:
version: '3.7'
services:
db-pg:
image: postgres:12
container_name: db-pg
ports:
- '${DB_PORT}:5432'
environment:
ALLOW_EMPTY_PASSWORD: 'no'
POSTGRES_USER: ${DB_USER}
POSTGRES_PASSWORD: ${DB_PASS}
POSTGRES_DB: ${DB_NAME}
volumes:
- ci-postgres-data:/data
ci-api:
build: .
container_name: ci-api
volumes:
- .:/home/node/api
- /home/node/api/node_modules
ports:
- '${SERVER_PORT}:${SERVER_PORT}'
depends_on:
- db-pg
command: ['./wait-pg.sh', 'yarn', 'dev']
logging:
driver: 'json-file'
options:
max-size: '10m'
max-file: '5'
volumes:
ci-postgres-data:
and get this error:
---> Running in c5add5098b70 ERROR: Unable to lock database:
Permission denied ERROR: Failed to open apk database: Permission
denied ERROR: Service 'ci-api' failed to build: The command '/bin/sh
-c apk add --no-cache openssl' returned a non-zero code: 99

Answer 1

You are getting the error because the node user you are trying to use does not have permissions to run the command.
Move the user definition to after the commands, something like this:
#building code
FROM node:lts-alpine
RUN mkdir -p /home/node/api && chown -R node:node /home/node/api
WORKDIR /home/node/api
COPY ormconfig.json .env package.json yarn.* ./
RUN yarn
COPY --chown=node:node . .
RUN apk add --no-cache openssl
COPY wait-pg.sh .
RUN chmod +x ./wait-pg.sh
USER node
ENTRYPOINT ["./wait-pg.sh"]
EXPOSE 4000
CMD ["yarn", "dev"]