Add gitea role

Added base gitea docker setup role.

Adds automatic unattended setup with default admin account and optional
email notification setup.

roles/gitea/templates/docker-stack.yml.j2

@@ -0,0 +1,68 @@
+version: '3.4'
+
+services:
+  app:
+    image: "{{ stack_image }}:{{ gitea_version }}"
+    healthcheck:
+      test: ["CMD", "wget", "--spider", "-q", "localhost:3000"]
+      interval: 1m
+      timeout: 10s
+      retries: 3
+      start_period: 1m
+    volumes:
+      - data:/data
+      - /home/git/.ssh:/data/git/.ssh
+      - /etc/timezone:/etc/timezone:ro
+      - /etc/localtime:/etc/localtime:ro
+    environment:
+      - USER_UID={{ git_user['uid'] }}
+      - USER_GID={{ git_user['group'] }}
+      - GITEA__database__DB_TYPE=postgres
+      - GITEA__database__HOST=db:5432
+      - GITEA__database__NAME={{ gitea_db_database }}
+      - GITEA__database__USER={{ gitea_db_username }}
+      - GITEA__database__PASSWD={{ gitea_db_password }}
+      - "GITEA__server__ROOT_URL={{ (gitea_use_https == True) | ternary('https', 'http') }}://{{ (subdomain_alias is not undefined and not none) | ternary(subdomain_alias, stack_name) }}.{{server_domain}}"
+      - "GITEA__server__SSH_DOMAIN={{ server_domain }}"
+      - GITEA__server__LANDINGPAGE=explore
+      - GITEA__service__DISABLE_REGISTRATION=true
+{% if gitea_app_admin_username is not undefined and not None and gitea_app_admin_password is not undefined and not None %}
+      - GITEA__security__INSTALL_LOCK=true
+{% endif %}
+{% if gitea_smtp_host is not undefined and not None and gitea_smtp_username is not undefined and not None and gitea_smtp_password is not undefined and not None %}
+      - GITEA__mailer__ENABLED=true
+      - GITEA__service__ENABLE_NOTIFY_MAIL=true
+      - GITEA__mailer__FROM=gitea@{{ server_domain }}
+      - GITEA__mailer__TYPE=smtp
+      - GITEA__mailer__HOST={{ gitea_smtp_host }}
+      - GITEA__mailer__IS_TLS_ENABLED={{ (gitea_smtp_force_tls is not undefined and not None) | ternary(gitea_smtp_force_tls,'false') }}
+      - GITEA__mailer__USER={{ gitea_smtp_username }}
+      - GITEA__mailer__PASSWD={{ gitea_smtp_password }}
+{% endif %}
+    networks:
+      - "{{ docker_swarm_public_network_name }}"
+      - backend
+    ports:
+      - "127.0.0.1:2222:22"
+
+  db:
+    image: postgres:13
+    volumes:
+      - db:/var/lib/postgresql/data
+    networks:
+      - backend
+    environment:
+      - POSTGRES_USER={{ gitea_db_username }}
+      - POSTGRES_PASSWORD={{ gitea_db_password }}
+      - POSTGRES_DB={{ gitea_db_database }}
+
+volumes:
+  data:
+  db:
+
+networks:
+  "{{ docker_swarm_public_network_name }}":
+    external: true
+  backend:
+
+