build: add installer script

scripts/installer/compose.yml

@@ -0,0 +1,38 @@
+---
+version: "3.8"
+
+services:
+  app:
+    image: "nginx:stable"
+    configs:
+      - source: abra_conf
+        target: /etc/nginx/conf.d/abra.conf
+      - source: abra_installer
+        target: /var/www/abra-installer/installer
+    volumes:
+      - "public:/var/www/abra-installer"
+    networks:
+      - proxy
+    deploy:
+      update_config:
+        failure_action: rollback
+        order: start-first
+      labels:
+        - "traefik.enable=true"
+        - "traefik.http.services.abra-installer.loadbalancer.server.port=80"
+        - "traefik.http.routers.abra-installer.rule=Host(`install.abra.autonomic.zone`,`install.abra.coopcloud.tech`)"
+        - "traefik.http.routers.abra-installer.entrypoints=web-secure"
+        - "traefik.http.routers.abra-installer.tls.certresolver=production"
+
+configs:
+  abra_installer:
+    file: installer
+  abra_conf:
+    file: nginx.conf
+
+networks:
+  proxy:
+    external: true
+
+volumes:
+  public: