fix: Gitea Traefik routing and connection pool optimization

- Remove middleware reference from Gitea Traefik labels (caused routing issues)
- Optimize Gitea connection pool settings (MAX_IDLE_CONNS=30, authentication_timeout=180s)
- Add explicit service reference in Traefik labels
- Fix intermittent 504 timeouts by improving PostgreSQL connection handling

Fixes Gitea unreachability via git.michaelschiemer.de

deployment/ansible/playbooks/check-env-file.yml

@@ -0,0 +1,83 @@
+---
+- name: Check .env File and Environment Variables
+  hosts: production
+  gather_facts: no
+  become: no
+
+  vars:
+    application_stack_dest: "{{ app_stack_path | default(stacks_base_path + '/production') }}"
+    application_compose_suffix: "production.yml"
+
+  tasks:
+    - name: Check if .env file exists
+      stat:
+        path: "{{ application_stack_dest }}/.env"
+      delegate_to: "{{ inventory_hostname }}"
+      register: env_file_exists
+
+    - name: Display .env file status
+      debug:
+        msg: ".env file exists: {{ env_file_exists.stat.exists }}"
+
+    - name: Read .env file content (first 50 lines)
+      shell: |
+        head -50 {{ application_stack_dest }}/.env 2>&1 || echo "FILE_NOT_FOUND"
+      delegate_to: "{{ inventory_hostname }}"
+      register: env_file_content
+      changed_when: false
+      when: env_file_exists.stat.exists
+
+    - name: Display .env file content
+      debug:
+        msg: |
+          .env file content:
+          {{ env_file_content.stdout }}
+
+    - name: Check for DB_DATABASE in .env file
+      shell: |
+        grep -E "^DB_DATABASE=|^DB_NAME=" {{ application_stack_dest }}/.env 2>&1 || echo "NOT_FOUND"
+      delegate_to: "{{ inventory_hostname }}"
+      register: db_database_check
+      changed_when: false
+      when: env_file_exists.stat.exists
+
+    - name: Display DB_DATABASE check
+      debug:
+        msg: "DB_DATABASE in .env: {{ db_database_check.stdout }}"
+
+    - name: Check environment variables in queue-worker container
+      shell: |
+        docker compose -f {{ application_stack_dest }}/docker-compose.base.yml -f {{ application_stack_dest }}/docker-compose.{{ application_compose_suffix }} exec -T queue-worker env | grep -E "^DB_" | sort
+      register: queue_worker_env
+      changed_when: false
+      failed_when: false
+      ignore_errors: yes
+
+    - name: Display queue-worker environment variables
+      debug:
+        msg: |
+          Queue-Worker DB Environment Variables:
+          {{ queue_worker_env.stdout | default('CONTAINER_NOT_RUNNING') }}
+
+    - name: Check docker-compose project directory
+      shell: |
+        cd {{ application_stack_dest }} && pwd
+      delegate_to: "{{ inventory_hostname }}"
+      register: project_dir
+      changed_when: false
+
+    - name: Display project directory
+      debug:
+        msg: "Docker Compose project directory: {{ project_dir.stdout }}"
+
+    - name: Check if .env file is in project directory
+      shell: |
+        test -f {{ application_stack_dest }}/.env && echo "EXISTS" || echo "MISSING"
+      delegate_to: "{{ inventory_hostname }}"
+      register: env_in_project_dir
+      changed_when: false
+
+    - name: Display .env file location check
+      debug:
+        msg: ".env file in project directory: {{ env_in_project_dir.stdout }}"
+