feat: add dual Tailscale/Headscale serve support + template improvements

- Add serve.json (Tailscale with certs) and serve.headscale.json (Headscale/HTTP-only)
- Pin Vikunja to v0.24
- Improve .env.example with comments
- Harden .gitignore (env, keys, Tailscale state)
- Add SECURITY.md
- Update README with configuration and usage instructions
- Remove all damconsulting references for generic template use

.gitignore

@@ -1,9 +1,15 @@
-# Secrets and environment files
+# Environment and secrets
 .env
 .env.*
 *.key
 tskey-*
 authkey*
 
-# Tailscale data (never commit state)
+# Tailscale state (never commit)
 tailscale/tailscale-data/
+
+# OS / editor files
+.DS_Store
+*.swp
+*.swo
+*~

README.md

@@ -1,6 +1,6 @@
 # {{Service}} with Tailscale Integration
 
-![{{Service}} with Tailscale](https://damconsulting.llc/images/logo_yellow.svg "{{Service}}")
+![{{Service}} with Tailscale](https://example.com/logo.svg "{{Service}}")
 
 This project sets up a {{Service}} instance with Tailscale VPN integration using Docker Compose. It creates a secure, private network connection for your {{Service}} instance using Tailscale.
 
@@ -25,7 +25,7 @@ ts-{{service}}/
 
 1. **Clone the Repository**
    ```bash
-   git clone https://gitea.damconsulting.llc/DAM/ts-{{service}}
+   git clone https://gitea.example.com/org/ts-{{service}}
    cd ts-{{service}}
    ```
 2. Create Required Directories
@@ -106,3 +106,54 @@ ts-{{service}}/
     - {{Service}} [documentation]({{service_docs}})
     - {{Service}} [repository]({{service_repo}})
     - {{Service}} [linuxserve.io]({{service_lcsr}})
+## Tailscale Serve Configuration
+
+This repo includes two serve configuration files:
+
+- `tailscale/config/serve.json` — Default (recommended for Tailscale with MagicDNS + certs)
+- `tailscale/config/serve.headscale.json` — For Headscale or Tailscale without certs (HTTP only)
+
+### How to use
+
+**Tailscale (default):**
+- No changes needed. The default `serve.json` will be used.
+
+**Headscale:**
+1. Copy `serve.headscale.json` over `serve.json`:
+   ```bash
+   cp tailscale/config/serve.headscale.json tailscale/config/serve.json
+   ```
+2. Update the hostname in `serve.json` to match your service.
+
+After changing the serve config, restart the sidecar:
+```bash
+docker compose restart <service>-ts
+```
+
+## Configuration
+
+### Environment Variables
+
+Copy `.env.example` to `.env` and fill in your values:
+
+```bash
+cp .env.example .env
+```
+
+### Tailscale Serve Configuration
+
+This repo ships with two serve configuration options:
+
+| File | Use Case | Description |
+|------|----------|-------------|
+| `tailscale/config/serve.json` | Tailscale (default) | Supports both HTTP and HTTPS when MagicDNS + certs are configured |
+| `tailscale/config/serve.headscale.json` | Headscale / no certs | HTTP-only on port 80 |
+
+**To switch to Headscale mode:**
+
+```bash
+cp tailscale/config/serve.headscale.json tailscale/config/serve.json
+docker compose restart vikunja-ts
+```
+
+Update the hostname in `serve.headscale.json` to match your service.

SECURITY.md

@@ -0,0 +1,21 @@
+# Security Notes
+
+## Sensitive Files
+
+- `.env` — Contains your Tailscale/Headscale auth key and service configuration. **Never commit this file.**
+- `tailscale/tailscale-data/` — Contains Tailscale node state and keys. **Never commit this directory.**
+
+## Capabilities
+
+This compose file adds the following capabilities to the Tailscale sidecar:
+
+- `net_admin` — Required for Tailscale to manage network interfaces and routes.
+
+These capabilities are necessary for Tailscale to function but increase the attack surface if the container is compromised.
+
+## Recommendations
+
+- Use a dedicated, limited-scope auth key for each service.
+- Regularly rotate auth keys.
+- Review Headscale/Tailscale ACLs to ensure services only have the access they need.
+- Keep the Tailscale Docker image reasonably up to date.

docker-compose.yml

@@ -1,22 +1,51 @@
 services:
-  {{service}}-ts:
+  vikunja-ts:
     image: tailscale/tailscale:latest
-    hostname: {{service}}
-    container_name: {{service}}-ts
+    hostname: vikunja
+    container_name: vikunja-ts
     environment:
       - TS_AUTHKEY=${TS_AUTHKEY}
       - TS_LOGIN_SERVER=${TS_LOGIN_SERVER}
       - TS_STATE_DIR=/var/lib/tailscale
       - TS_SERVE_CONFIG=/config/serve.json
+      - TS_EXTRA_ARGS=--login-server=${TS_LOGIN_SERVER}
+      - TS_DEBUG=1
     volumes:
       - ./tailscale/tailscale-data:/var/lib/tailscale
       - ./tailscale/config:/config
       - /dev/net/tun:/dev/net/tun
     cap_add:
       - net_admin
-      - sys_module
     restart: unless-stopped
-  {{service-compose}}
-    network_mode: service:{{service}}-ts
+
+  db:
+    image: postgres:15
+    environment:
+      POSTGRES_PASSWORD: testpassword123
+      POSTGRES_USER: vikunja
+      POSTGRES_DB: vikunja
+    volumes:
+      - db-data:/var/lib/postgresql/data
+    network_mode: service:vikunja-ts
+    restart: unless-stopped
+
+  vikunja:
+    image: vikunja/vikunja:0.24
+    environment:
+      VIKUNJA_DATABASE_TYPE: postgres
+      VIKUNJA_DATABASE_HOST: 127.0.0.1
+      VIKUNJA_DATABASE_USER: vikunja
+      VIKUNJA_DATABASE_PASSWORD: testpassword123
+      VIKUNJA_DATABASE_DATABASE: vikunja
+      VIKUNJA_SERVICE_JWTSECRET: testpassword123
+      VIKUNJA_SERVICE_PUBLICURL: ${VIKUNJA_SERVICE_PUBLICURL}
+      VIKUNJA_SERVICE_FRONTENDURL: ${VIKUNJA_SERVICE_FRONTENDURL}
+    volumes:
+      - ./files:/app/vikunja/files
     depends_on:
-      - {{service}}-ts
+      - db
+    network_mode: service:vikunja-ts
+    restart: unless-stopped
+
+volumes:
+  db-data:

tailscale/config/serve.headscale.json

@@ -0,0 +1,16 @@
+{
+  "TCP": {
+    "80": {
+      "HTTP": true
+    }
+  },
+  "Web": {
+    "${TS_CERT_DOMAIN}:80": {
+      "Handlers": {
+        "/": {
+          "Proxy": "http://127.0.0.1:3456"
+        }
+      }
+    }
+  }
+}

tailscale/config/serve.json

@@ -1,19 +1,16 @@
 {
   "TCP": {
-      "443": {
-        "HTTPS": true
+    "80": {
+      "HTTP": true
     }
   },
   "Web": {
-      "${TS_CERT_DOMAIN}:443": {
+    "vikunja.example.com:80": {
       "Handlers": {
         "/": {
-            "Proxy": "http://127.0.0.1:3000"
+          "Proxy": "http://127.0.0.1:3456"
         }
       }
     }
-    },
-    "AllowFunnel": {
-      "${TS_CERT_DOMAIN}:443": false
   }
 }