Docker-Nginx unexpected redirects (304) - docker

Question

I’m having trouble with docker-compose and nginx. First, I have this docker-compose.yml:
services:
nginx:
build: ./nginx
ports:
- '8080:80'
depends_on:
- web
- api
web:
build: ./web
depends_on:
- api
api:
build: ./api
Both web (port 3000) and api (port 8000) are express servers that return WEB and API respectively. Now, inside ./nginx:
# Dockefile
FROM nginx:alpine
COPY ["default.conf", "/etc/nginx/conf.d/"]
EXPOSE 80
# default.conf
server {
location / {
proxy_pass http://web:3000;
}
location /api {
proxy_pass http://api:8000;
}
}
Now, when I go to http://localhost:8080, I get WEB, but when I go to http://localhost:8080/api, it redirects to http://localhost:1337/api/ and I get nothing (by the way, it throws a 304 error)
However, when I write this default.conf (put api in /)
# default.conf
server {
location / {
proxy_pass http://api:8000;
}
location /api {
proxy_pass http://web:3000;
}
}
I get the same result but in / I get API, so both servers work.

Answer 1

I don't know whether it helps you or not. I am using nginx docker image directly in my docker-compose.
for example.
docker-compose.yml
version: '3'
services:
jobsaf-server:
build:
context: .
dockerfile: Dockerfile.production
container_name: jobsaf-server
ports:
- "3000:3000"
- "5858:5858"
- "35729:35729"
- "6379:6379"
environment:
- NODE_ENV=production
networks:
- front-tier
- back-tier
depends_on:
- "redis"
- "mongo"
links:
- mongo
- redis
volumes:
- ./server:/var/www/app/jobsaf-website/server
nginx:
image: nginx:stable
depends_on:
- jobsaf-server
links:
- jobsaf-server
volumes:
- ./nginx/default.conf:/etc/nginx/conf.d/default.conf
ports:
- "0.0.0.0:80:80"
mongo:
image: mongo:latest
container_name: mongo
volumes:
- "db-data:/data/db"
environment:
- MONGO_INITDB_ROOT_USERNAME=${DB_USER}
- MONGO_INITDB_ROOT_PASSWORD=${DB_PASS}
- MONGO_INITDB_DATABASE=admin
ports:
- "0.0.0.0:27017:27017"
networks:
- back-tier
redis:
image: redis
container_name: redis
networks:
- back-tier
volumes:
db-data:
# - /data/db
networks:
front-tier:
back-tier: