nginx to reverse proxy 2 local lambdas in docker containers - docker

Question

I have 2 lambda functions wrapped in docker containers and am using docker compose to run them together. One runs on port 9000 the other on port 9001. I am trying to use nginx to allow them to both be reachable on the same port locally. I am able to hit each lambda individually at their respective port in postman at
localhost:9000/2015-03-31/functions/function/invocations
but not at the nginx mapped port.
Here is my default.conf
server {
listen 80;
server_name localhost;
location /user-api/ {
proxy_pass http://127.0.0.1:9000/2015-03-31/functions/function/invocations;
}
location /cart-api/ {
proxy_pass http://127.0.0.1:9001/2015-03-31/functions/function/invocations;
}
}
Here is my docker-compose.yml
version: "3.7"
services:
user-api:
build: ./app/lambdas/user-api
ports:
- 9000:8080
env_file:
- .env
cart-api:
build: ./app/lambdas/cart-api
ports:
- 9001:8080
env_file:
- .env
nginx-proxy:
depends_on:
- user-api
- cart-api
image: nginx:alpine
volumes:
- $PWD/default.conf:/etc/nginx/conf.d/default.conf
networks:
my-network-name:
aliases:
- api-g-way
ports:
- 1234:80
networks:
my-network-name:
Here is the terminal output when I try to access either one
Use 'docker scan' to run Snyk tests against images to find vulnerabilities and learn how to fix them
[+] Running 3/0
⠿ Container my-lambdas-cart-api-1 Created 0.0s
⠿ Container my-lambdas-user-api-1 Created 0.0s
⠿ Container my-lambdas-nginx-proxy-1 Created 0.0s
Attaching to my-lambdas-cart-api-1, my-lambdas-nginx-proxy-1, my-lambdas-user-api-1
my-lambdas-cart-api-1 | 22 Oct 2022 19:20:35,282 [INFO] (rapid) exec '/var/runtime/bootstrap' (cwd=/var/task, handler=)
my-lambdas-user-api-1 | 22 Oct 2022 19:20:35,301 [INFO] (rapid) exec '/var/runtime/bootstrap' (cwd=/var/task, handler=)
my-lambdas-nginx-proxy-1 | /docker-entrypoint.sh: /docker-entrypoint.d/ is not empty, will attempt to perform configuration
my-lambdas-nginx-proxy-1 | /docker-entrypoint.sh: Looking for shell scripts in /docker-entrypoint.d/
my-lambdas-nginx-proxy-1 | /docker-entrypoint.sh: Launching /docker-entrypoint.d/10-listen-on-ipv6-by-default.sh
my-lambdas-nginx-proxy-1 | 10-listen-on-ipv6-by-default.sh: info: Getting the checksum of /etc/nginx/conf.d/default.conf
my-lambdas-nginx-proxy-1 | 10-listen-on-ipv6-by-default.sh: info: /etc/nginx/conf.d/default.conf differs from the packaged version
my-lambdas-nginx-proxy-1 | /docker-entrypoint.sh: Launching /docker-entrypoint.d/20-envsubst-on-templates.sh
my-lambdas-nginx-proxy-1 | /docker-entrypoint.sh: Launching /docker-entrypoint.d/30-tune-worker-processes.sh
my-lambdas-nginx-proxy-1 | /docker-entrypoint.sh: Configuration complete; ready for start up
my-lambdas-nginx-proxy-1 | 2022/10/22 19:20:35 [notice] 1#1: using the "epoll" event method
my-lambdas-nginx-proxy-1 | 2022/10/22 19:20:35 [notice] 1#1: nginx/1.23.2
my-lambdas-nginx-proxy-1 | 2022/10/22 19:20:35 [notice] 1#1: built by gcc 11.2.1 20220219 (Alpine 11.2.1_git20220219)
my-lambdas-nginx-proxy-1 | 2022/10/22 19:20:35 [notice] 1#1: OS: Linux 5.10.124-linuxkit
my-lambdas-nginx-proxy-1 | 2022/10/22 19:20:35 [notice] 1#1: getrlimit(RLIMIT_NOFILE): 1048576:1048576
my-lambdas-nginx-proxy-1 | 2022/10/22 19:20:35 [notice] 1#1: start worker processes
my-lambdas-nginx-proxy-1 | 2022/10/22 19:20:35 [notice] 1#1: start worker process 29
my-lambdas-nginx-proxy-1 | 2022/10/22 19:20:35 [notice] 1#1: start worker process 30
my-lambdas-nginx-proxy-1 | 2022/10/22 19:20:35 [notice] 1#1: start worker process 31
my-lambdas-nginx-proxy-1 | 2022/10/22 19:20:35 [notice] 1#1: start worker process 32
my-lambdas-nginx-proxy-1 | 2022/10/22 19:20:35 [notice] 1#1: start worker process 33
my-lambdas-nginx-proxy-1 | 172.19.0.1 - - [22/Oct/2022:19:20:40 +0000] "POST /user-api HTTP/1.1" 502 157 "-" "PostmanRuntime/7.29.2" "-"
my-lambdas-nginx-proxy-1 | 2022/10/22 19:20:40 [error] 29#29: *1 connect() failed (111: Connection refused) while connecting to upstream, client: XXX.XX.XX.XXX, server: localhost, request: "POST /user-api HTTP/1.1", upstream: "http://127.0.0.1:9000/2015-03-31/functions/function/invocations", host: "127.0.0.1:1234"
It seems to be hitting the correct upstream address but I am getting connection refused. Bear in mind this is my first time using nginx. Any help would be appreciated!