Add µPaaS deployment setup for fsn1app1

- Add Docker HEALTHCHECK instruction probing /.well-known/healthcheck.json
  (30s interval, 5s timeout, 10s start period, 3 retries) for µPaaS
  container health verification
- Create deploy/README.md with full µPaaS app configuration reference
  (app name, repo URL, branch, env vars, volumes, ports, production config)
- Add Deployment section to README.md linking to deploy docs
- Add deploy/ to .dockerignore (docs not needed in build context)

.dockerignore

@@ -6,3 +6,4 @@
 node_modules
 bin/
 data/
+deploy/

Dockerfile

@@ -75,4 +75,7 @@ WORKDIR /var/lib/pixa
 
 EXPOSE 8080
 
+HEALTHCHECK --interval=30s --timeout=5s --start-period=10s --retries=3 \
+    CMD wget -q --spider http://localhost:8080/.well-known/healthcheck.json
+
 ENTRYPOINT ["/usr/local/bin/pixad", "--config", "/etc/pixa/config.yml"]

README.md

@@ -125,6 +125,17 @@ See `config.example.yml` for all options with defaults.
 - **Metrics**: Prometheus
 - **Logging**: stdlib slog
 
+## Deployment
+
+Pixa is deployed via
+[µPaaS](https://git.eeqj.de/sneak/upaas) on `fsn1app1`
+(paas.datavi.be). Pushes to `main` trigger automatic builds and
+deployments. The Dockerfile includes a `HEALTHCHECK` that probes
+`/.well-known/healthcheck.json`.
+
+See [deploy/README.md](deploy/README.md) for the full µPaaS app
+configuration, volume mounts, and production setup instructions.
+
 ## TODO
 
 See [TODO.md](TODO.md) for the full prioritized task list.

cmd/pixad/main.go

@@ -17,7 +17,10 @@ import (
 	"sneak.berlin/go/pixa/internal/server"
 )
 
-var Version string //nolint:gochecknoglobals // set by ldflags
+var (
+	Appname = "pixad" //nolint:gochecknoglobals // set by ldflags
+	Version string    //nolint:gochecknoglobals // set by ldflags
+)
 
 var configPath string //nolint:gochecknoglobals // cobra flag
 
@@ -37,6 +40,7 @@ func main() {
 }
 
 func run(_ *cobra.Command, _ []string) {
+	globals.Appname = Appname
 	globals.Version = Version
 
 	// Set config path in environment if specified via flag

deploy/README.md

@@ -0,0 +1,78 @@
+# Pixa Deployment via µPaaS
+
+Pixa is deployed on `fsn1app1` via
+[µPaaS](https://git.eeqj.de/sneak/upaas) (paas.datavi.be).
+
+## µPaaS App Configuration
+
+Create the app in the µPaaS web UI with these settings:
+
+| Setting | Value |
+| --- | --- |
+| **App name** | `pixa` |
+| **Repo URL** | `git@git.eeqj.de:sneak/pixa.git` |
+| **Branch** | `main` |
+| **Dockerfile path** | `Dockerfile` |
+
+### Environment Variables
+
+| Variable | Description | Required |
+| --- | --- | --- |
+| `PORT` | HTTP listen port (default: 8080) | No |
+
+Configuration is provided via the config file baked into the Docker
+image at `/etc/pixa/config.yml`. To override it, mount a custom
+config file as a volume (see below).
+
+### Volumes
+
+| Host Path | Container Path | Description |
+| --- | --- | --- |
+| `/srv/pixa/data` | `/var/lib/pixa` | SQLite database and image cache |
+| `/srv/pixa/config.yml` | `/etc/pixa/config.yml` | Production config (signing key, whitelist, etc.) |
+
+### Ports
+
+| Host Port | Container Port | Protocol |
+| --- | --- | --- |
+| (assigned) | 8080 | TCP |
+
+### Docker Network
+
+Attach to the shared reverse-proxy network if using Caddy/Traefik
+for TLS termination.
+
+## Production Configuration
+
+Copy `config.example.yml` from the repo root and customize for
+production:
+
+```yaml
+port: 8080
+debug: false
+maintenance_mode: false
+state_dir: /var/lib/pixa
+signing_key: "<generate with: openssl rand -base64 32>"
+whitelist_hosts:
+    - s3.sneak.cloud
+    - static.sneak.cloud
+    - sneak.berlin
+allow_http: false
+```
+
+**Important:** Generate a unique `signing_key` for production. Never
+use the default placeholder value.
+
+## Health Check
+
+The Dockerfile includes a `HEALTHCHECK` instruction that probes
+`/.well-known/healthcheck.json` every 30 seconds. µPaaS verifies
+container health 60 seconds after deployment.
+
+## Deployment Flow
+
+1. Push to `main` triggers the Gitea webhook
+2. µPaaS clones the repo and runs `docker build .`
+3. The Dockerfile runs `make check` (format, lint, test) during build
+4. On success, µPaaS stops the old container and starts the new one
+5. After 60 seconds, µPaaS checks container health

internal/globals/globals.go

@@ -5,10 +5,11 @@ import (
 	"go.uber.org/fx"
 )
 
-const appname = "pixad"
+// Build-time variables populated from main() via ldflags.
-
+var (
-// Version is populated from main() via ldflags.
+	Appname string //nolint:gochecknoglobals // set from main
-var Version string //nolint:gochecknoglobals // set from main
+	Version string //nolint:gochecknoglobals // set from main
+)
 
 // Globals holds application-wide constants.
 type Globals struct {
@@ -19,7 +20,7 @@ type Globals struct {
 // New creates a new Globals instance from build-time variables.
 func New(_ fx.Lifecycle) (*Globals, error) {
 	return &Globals{
-		Appname: appname,
+		Appname: Appname,
 		Version: Version,
 	}, nil
 }