Jira Software on Docker: HTTP Status 404 – Not Found

[Enissay]

I have deployed a fresh Jira Software on my server with a HAProxy & Postgres but I am getting the 404 error:

Please note that:

• Docker: the container launches with tons of warnings and some errors (see full container log 7000+ lines http://controlc.com/38dc1656). It still says at the end that everything was fine: 

Jira 8.15.0 build: 815001 started. You can now access Jira through your web browser. Plugins and caches are being initialised.

• HAProxy: I am not seeing any issue here. Jira is reachable and the error seem to be coming from within the container. Still, see HAProxy config below.

• Postgres: No issue here either since I can see tables created in the DB

Config:

• Docker: I use Portainer to deploy the last version of the image using the below config

services:
  jira:
    image: atlassian/jira-software:8.15
    volumes:
      - /data/jira:/var/atlassian/application-data/jira
    environment:
      - ATL_DB_DRIVER=org.postgresql.Driver
      - ATL_DB_TYPE=postgres72
      - ATL_JDBC_URL=jdbc:postgresql://postgresdb:5432/jiradb?sslmode=require
      - ATL_JDBC_USER=jira
      - ATL_JDBC_PASSWORD=topSecretPsw
      - ATL_TOMCAT_SCHEME=https
      - ATL_TOMCAT_SECURE=true
      - ATL_TOMCAT_PORT=8100
      - ATL_PROXY_NAME=jira.mydomain.com
      - ATL_PROXY_PORT=443
      - ATL_TOMCAT_CONTEXTPATH=/jira

•  HAProxy:

defaults
    mode    http
    log     global
    option  httplog
    option  dontlognull
    timeout connect 5s
    timeout client  50s
    timeout server  50s

frontend https-in
    bind *:80
    bind *:443 ssl crt /usr/local/etc/certs/mydomain.com.pem
    
    redirect scheme https code 301 if !{ ssl_fc }
    
    http-response add-header Strict-Transport-Security "max-age=16000000; includeSubDomains; preload;"
    http-response add-header X-Frame-Options SAMEORIGIN
    
    acl jira hdr(host) -i jira.mydomain.com
    use_backend jira-be if jira

backend jira-be
    option forwardfor
    http-request add-header X-Forwarded-Proto https
    server jira jira_jira:8100 check resolvers docker init-addr libc,none

Can you please help pointing me out to what is wrong (see log) as all my attempts including searching here ended up unsuccessful.

Thank you in advance.