make nginx use env for maelstro backend

docker-compose-solo.yml

@@ -30,6 +30,8 @@ services:
       timeout: 10s
     volumes:
       - ./config/:/etc/maelstro/:ro
+    environment:
+      MAELSTRO_BACK_HOST: maelstro-back
     ports:
       - "8080:8080"
 

docker-compose.yml

@@ -12,6 +12,7 @@ services:
     ports: []
     environment:
       CUSTOM_SCRIPTS_DIRECTORY: /etc/georchestra/maelstro/scripts
+      MAELSTRO_BACK_HOST: maelstro-back
     depends_on:
       envsubst:
         condition: service_completed_successfully

frontend/Dockerfile

@@ -16,5 +16,5 @@ FROM nginxinc/nginx-unprivileged:1.27-alpine
 
 ENV CUSTOM_SCRIPTS_DIRECTORY ""
 COPY --from=builder --chown=nginx /app/dist /app
-COPY nginx-default.conf /etc/nginx/conf.d/default.conf
+COPY nginx-default.conf.template /etc/nginx/templates/nginx-default.conf.template
 COPY ./docker-entrypoint.sh /

frontend/nginx-default.conf → frontend/nginx-default.conf.template

@@ -14,7 +14,7 @@ server {
     }
 
     location /maelstro-backend {
-      proxy_pass http://maelstro-back:8000;
+      proxy_pass http://${MAELSTRO_BACK_HOST}:8000;
       add_header Cache-Control "public, max-age=0, s-maxage=0, must-revalidate" always;
     }