Cannot access to spring boot application running with docker-compose - spring-boot

Question

I have a simple application composed by spring boot and mariadb. OS is mac OS, and using IntelliJ as IDE. Dockerfile for spring app is below;
FROM openjdk:14-jdk-alpine
RUN mkdir /app
WORKDIR /app
VOLUME /app
ENV JAR_TARGET "my_app-0.0.1-SNAPSHOT.jar"
ENTRYPOINT ["sh","-c","java -jar ./build/libs/${JAR_TARGET}"]
And docker-compose.yml which refers Dockerfile above is like;
version: "3.3"
services:
app:
build: docker/.
ports:
- "8080:8080"
volumes:
- .:/app
depends_on:
- db
environment:
spring.datasource.driverClassName: "org.mariadb.jdbc.Driver"
spring.datasource.url: "jdbc:mariadb://db:3306/my_app_db"
spring.datasource.username: "user"
spring.datasource.password: "password"
server.port: 8080
server.address: 127.0.0.1
db:
image: mariadb
ports:
- "3306:3306"
environment:
- MYSQL_DATABASE=my_app_db
- MYSQL_USER=user
- MYSQL_PASSWORD=password
- MYSQL_ROOT_PASSWORD=rootpassword,
By typing the command docker-compose up --build into terminal, docker-compose starts runnning and spring boot app "my_app" also seems to be running with the log ... Started MyAppApplicationKt in 25.161 seconds (JVM running for 27.301).
However, when I try to access that spring app by calling http://localhost:8080/api, it is not responding. For example, when I do curl with the address, it is timed out every time. I checked with IP 127.0.0.1 too, but it resulted in the same; not responding.
When I see docker container ps, both spring app and mariadb look like successfully running as below.
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
b6abb2d330d9 my_app "sh -c 'java -jar -D…" 5 minutes ago Up 5 minutes 0.0.0.0:8080->8080/tcp my_app_1
fb3b3cad20ad mariadb "docker-entrypoint.s…" 17 minutes ago Up 5 minutes 0.0.0.0:3306->3306/tcp my_app_db_1
I cannot understand why this spring app is not responding when I reach http://localhost:8080/api. Any help would be really appreciated. Thank you for reading!

Answer 1

David Maze's comment did solve my problem. The docker container was not listening on 127.0.0.1 because I set inside process address on 127.0.0.1. I changed server.address in docker-compose.yml to 0.0.0.0, and it started listening on 127.0.0.1 for outside access.
Thank you so much for all comments, especially David who saved me!