ASP NET Core SQL Server Docker-Compose entry point bash script show errors on logs - bash

Question

I'm dockerizing an app but the entry point script doesn't work. The app couldn't perform CRUD actions and shows the "failed logging in with sa" error. I checked out the database because I suspect that the database didn't get created and yes, it didn't. So I thought the problem has to be the entry point script:
#!/bin/sh
set -e
until dotnet database update; do
echo "SQL Server is starting up"
sleep 1
done
echo "SQL Server is up - executing command"
dotnet database update
This script doesn't stop the app from building but it shows this in the log:
./Setup.sh: 1: ./Setup.sh: #!/bin/bash
not found
./Setup.sh: 2: ./Setup.sh:
not found
./Setup.sh: 3: set: Illegal option -
Here's the the docker file that's supposed to run the script above (named Migrations.Dockerfile):
FROM mcr.microsoft.com/dotnet/sdk:5.0 AS build
WORKDIR /src
COPY ["Project/Project.csproj", "Project/"]
COPY Setup.sh Project/Setup.sh
RUN dotnet tool install --global dotnet-ef
RUN dotnet restore "./Project/Project.csproj"
COPY . .
WORKDIR "/src/Project"
RUN /root/.dotnet/tools/dotnet-ef migrations add InitialMigrations
RUN chmod +x ./Setup.sh
CMD /bin/sh ./Setup.sh
And here's the docker-compose.yml file:
version: '3.4'
services:
project:
image: ${DOCKER_REGISTRY-}project
build:
context: .
dockerfile: Project/Dockerfile
ports:
- "9080:80"
depends_on:
- migrations
- db
db:
image: mcr.microsoft.com/mssql/server:2019-latest
environment:
SA_PASSWORD: "W0WV3RYSTRONGPASSWORD!"
ACCEPT_EULA: "Y"
ports:
- "14331:1433"
depends_on:
- migrations
migrations:
build:
context: .
dockerfile: Migrations.Dockerfile