Starting container process caused "exec: \"/tmp/run.sh\": permission denied": unknown

I have a Dockerfile

FROM composer:1.8.5 as build_stage

COPY . /src
WORKDIR /src
RUN composer install


FROM alpine:3.8
RUN apk --no-cache add \
php7 \
php7-mbstring \
php7-session \
php7-openssl \
php7-tokenizer \
php7-json \
php7-pdo \
php7-pdo_pgsql \
php7-pgsql
COPY --from=build_stage /src  /src
RUN ls -al
RUN set -x \
addgroup -g 82 -S www-data \
adduser -u 82 -D -S -G www-data www-data
WORKDIR /src
RUN ls -al
RUN chmod -R 777 storage
RUN sudo chmod +x run.sh
copy ./run.sh /tmp
ENTRYPOINT ["/tmp/run.sh"]

run.sh

#!/bin/sh

cd /app
php artisan migrate:fresh --seed
php artisan serve --host=0.0.0.0

and when I run, I kept getting

How would one go about and debug this further?