Add infra setup: Terraform for DO droplet + Cloudflare DNS, Ansible roles for Gitea, Vaultwarden, and Gitea runner

infra/ansible/roles/gitea/defaults/main.yml

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+---
+gitea_version: "1.22.3"
+gitea_domain: "git.example.com"
+gitea_http_port: 3000
+gitea_ssh_port: 2222
+gitea_data_dir: /var/lib/gitea
+
+# Cloudflare Origin Certificate
+cf_origin_cert: ""
+cf_origin_key: ""

infra/ansible/roles/gitea/handlers/main.yml

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+---
+- name: Restart gitea
+  community.docker.docker_compose_v2:
+    project_src: "{{ gitea_data_dir }}"
+    state: present
+    recreate: always
+
+- name: Reload nginx
+  systemd:
+    name: nginx
+    state: reloaded

infra/ansible/roles/gitea/tasks/main.yml

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+---
+- name: Install dependencies
+  apt:
+    name: [nginx, docker.io, docker-compose-v2]
+    state: present
+    update_cache: true
+
+- name: Enable and start Docker
+  systemd:
+    name: docker
+    enabled: true
+    state: started
+
+- name: Create gitea data directory
+  file:
+    path: "{{ gitea_data_dir }}"
+    state: directory
+    owner: root
+    group: root
+    mode: "0700"
+
+- name: Deploy docker-compose file
+  template:
+    src: docker-compose.yml.j2
+    dest: "{{ gitea_data_dir }}/docker-compose.yml"
+    mode: "0600"
+  notify: Restart gitea
+
+- name: Start gitea
+  community.docker.docker_compose_v2:
+    project_src: "{{ gitea_data_dir }}"
+    state: present
+
+# ─── Cloudflare Origin Certificate ───────────────────────────────────────────
+
+- name: Create SSL directory
+  file:
+    path: /etc/nginx/ssl
+    state: directory
+    owner: root
+    group: root
+    mode: "0700"
+
+- name: Install Cloudflare origin certificate
+  copy:
+    content: "{{ cf_origin_cert }}"
+    dest: /etc/nginx/ssl/cf-origin.pem
+    owner: root
+    group: root
+    mode: "0600"
+  notify: Reload nginx
+
+- name: Install Cloudflare origin key
+  copy:
+    content: "{{ cf_origin_key }}"
+    dest: /etc/nginx/ssl/cf-origin.key
+    owner: root
+    group: root
+    mode: "0600"
+  notify: Reload nginx
+
+# ─── nginx ────────────────────────────────────────────────────────────────────
+
+- name: Deploy nginx config
+  template:
+    src: nginx.conf.j2
+    dest: /etc/nginx/sites-available/gitea
+    mode: "0644"
+  notify: Reload nginx
+
+- name: Enable nginx site
+  file:
+    src: /etc/nginx/sites-available/gitea
+    dest: /etc/nginx/sites-enabled/gitea
+    state: link
+  notify: Reload nginx
+
+- name: Remove nginx default site
+  file:
+    path: /etc/nginx/sites-enabled/default
+    state: absent
+  notify: Reload nginx
+
+- name: Ensure nginx is started
+  systemd:
+    name: nginx
+    enabled: true
+    state: started

infra/ansible/roles/gitea/templates/docker-compose.yml.j2

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+services:
+  gitea:
+    image: gitea/gitea:{{ gitea_version }}
+    container_name: gitea
+    restart: unless-stopped
+    volumes:
+      - {{ gitea_data_dir }}/data:/data
+    environment:
+      USER_UID: 1000
+      USER_GID: 1000
+      GITEA__server__DOMAIN: "{{ gitea_domain }}"
+      GITEA__server__ROOT_URL: "https://{{ gitea_domain }}/"
+      GITEA__server__HTTP_PORT: 3000
+      GITEA__server__SSH_DOMAIN: "{{ gitea_domain }}"
+      GITEA__server__SSH_PORT: "{{ gitea_ssh_port }}"
+      GITEA__server__START_SSH_SERVER: "true"
+    ports:
+      - "127.0.0.1:{{ gitea_http_port }}:3000"
+      - "{{ gitea_ssh_port }}:22"

infra/ansible/roles/gitea/templates/nginx.conf.j2

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+server {
+    listen 80;
+    server_name {{ gitea_domain }};
+    return 301 https://$host$request_uri;
+}
+
+server {
+    listen 443 ssl;
+    server_name {{ gitea_domain }};
+
+    ssl_certificate     /etc/nginx/ssl/cf-origin.pem;
+    ssl_certificate_key /etc/nginx/ssl/cf-origin.key;
+
+    ssl_protocols       TLSv1.2 TLSv1.3;
+    ssl_ciphers         HIGH:!aNULL:!MD5;
+
+    location / {
+        proxy_pass         http://127.0.0.1:{{ gitea_http_port }};
+        proxy_set_header   Host              $host;
+        proxy_set_header   X-Real-IP         $remote_addr;
+        proxy_set_header   X-Forwarded-For   $proxy_add_x_forwarded_for;
+        proxy_set_header   X-Forwarded-Proto $scheme;
+    }
+}