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

@@ -1,7 +1,29 @@
+# Lint stage
+# golangci/golangci-lint:v2.10.1-alpine, 2026-02-17
+FROM golangci/golangci-lint:v2.10.1-alpine@sha256:33bc6b6156d4c7da87175f187090019769903d04dd408833b83083ed214b0ddf AS lint
+
+RUN apk add --no-cache make build-base vips-dev libheif-dev pkgconfig
+
+WORKDIR /src
+
+# Copy go mod files first for better layer caching
+COPY go.mod go.sum ./
+RUN go mod download
+
+# Copy source code
+COPY . .
+
+# Run formatting check and linter
+RUN make fmt-check
+RUN make lint
+
 # Build stage
 # golang:1.25.4-alpine, 2026-02-25
 FROM golang:1.25.4-alpine@sha256:d3f0cf7723f3429e3f9ed846243970b20a2de7bae6a5b66fc5914e228d831bbb AS builder
 
+# Depend on lint stage passing
+COPY --from=lint /src/go.sum /dev/null
+
 ARG VERSION=dev
 
 # Install build dependencies for CGO image libraries
@@ -9,25 +31,7 @@ RUN apk add --no-cache \
     build-base \
     vips-dev \
     libheif-dev \
-    pkgconfig \
+    pkgconfig
-    curl
-
-# golangci-lint v2.10.1, 2026-02-25
-# SHA-256 checksums per architecture (amd64 / arm64)
-RUN set -e; \
-    ARCH="$(uname -m)"; \
-    if [ "$ARCH" = "aarch64" ] || [ "$ARCH" = "arm64" ]; then \
-      GOARCH="arm64"; \
-      HASH="6652b42ae02915eb2f9cb2a2e0cac99514c8eded8388d88ae3e06e1a52c00de8"; \
-    else \
-      GOARCH="amd64"; \
-      HASH="dfa775874cf0561b404a02a8f4481fc69b28091da95aa697259820d429b09c99"; \
-    fi; \
-    curl -sSfL "https://github.com/golangci/golangci-lint/releases/download/v2.10.1/golangci-lint-2.10.1-linux-${GOARCH}.tar.gz" -o /tmp/golangci-lint.tar.gz && \
-    echo "${HASH}  /tmp/golangci-lint.tar.gz" | sha256sum -c - && \
-    tar -xzf /tmp/golangci-lint.tar.gz -C /tmp && \
-    mv "/tmp/golangci-lint-2.10.1-linux-${GOARCH}/golangci-lint" /usr/local/bin/ && \
-    rm -rf /tmp/golangci-lint*
 
 WORKDIR /src
 
@@ -38,8 +42,8 @@ RUN GOTOOLCHAIN=auto go mod download
 # Copy source code
 COPY . .
 
-# Run all checks (fmt-check, lint, test)
+# Run tests
-RUN make check
+RUN make test
 
 # Build with CGO enabled
 RUN CGO_ENABLED=1 GOTOOLCHAIN=auto go build -ldflags "-X main.Version=${VERSION}" -o /pixad ./cmd/pixad
@@ -71,4 +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.

TODO.md

@@ -1,64 +1,65 @@
-# Status
+# Pixa 1.0 TODO
 
-pre-1.0. No git tags. Full policy file set is present, but make check
+Remaining tasks sorted by priority for a working 1.0 release.
-fails on main with 10 gosec lint findings, so main is not green.
 
-# Next Step
+## P0: Critical for 1.0
 
-Fix the 10 gosec findings so make check passes on main. Fix each issue
+### Image Processing
-properly (no blanket nolint suppressions) and confirm lint, tests, and
+- [x] Add WebP encoding support (currently returns error)
-CI are green. This restores the main-always-green policy.
+- [x] Add AVIF encoding support (implemented via govips)
 
-# Completed Steps
+### Manual Testing (verify auth/encrypted URLs work)
+- [ ] Manual test: visit `/`, see login form
+- [ ] Manual test: enter wrong key, see error
+- [ ] Manual test: enter correct signing key, see generator form
+- [ ] Manual test: generate encrypted URL, verify it works
+- [ ] Manual test: wait for expiration or use short TTL, verify expired URL returns 410
+- [ ] Manual test: logout, verify redirected to login
 
-- 2026-02-25: Docker arm64 build fixed via architecture detection for
+### Cache Management
-  golangci-lint download (#16)
+- [ ] Implement cache size management/eviction (prevent disk from filling up)
-- 2026-02-25: full repo policy compliance pass (#14): LICENSE,
-  REPO_POLICIES.md, .editorconfig, Gitea Actions CI workflow, Docker
-  images pinned by hash, README restructured to policy sections, hooks
-  Makefile target, golangci-lint errors resolved
-- 2026-02-20: stale local dev config files removed (#12)
-- 2026-02-09: correctness fixes: negative cache checked in Service.Get()
-  before upstream fetch (#8); Stats() column scanning and HitRate
-  computation corrected (#9)
-- 2026-02-08: AllowHTTP propagated to SourceURL() scheme selection (#6)
-- WebP encoding support added (P0 item, checked off in TODO)
-- 2026-01-08: initial implementation with Makefile and TODO checklist
 
-# Future Steps
+### Configuration
+- [ ] Validate configuration on startup (fail fast on bad config)
 
-Compliance:
+## P1: Important for Production
 
-- After the gosec fix lands, verify CI runs make check green on main
+### Security
+- [ ] Implement blocked networks configuration (extend SSRF protection)
+- [ ] Add rate limiting global concurrent fetches (prevent resource exhaustion)
 
-P0, critical for 1.0 (from existing TODO.md):
+### Image Processing
+- [ ] Implement EXIF/metadata stripping (privacy)
 
-- Add AVIF encoding support (currently returns error)
+## P2: Nice to Have
-- Manual test pass for auth and encrypted URLs:
-    - visit /, see login form
-    - wrong key shows error; correct signing key shows generator form
-    - generated encrypted URL works
-    - expired URL (short TTL) returns 410
-    - logout redirects to login
-- Implement cache size management and eviction (prevent disk fill)
-- Validate configuration on startup (fail fast on bad config)
 
-P1, important for production:
+### Security
+- [ ] Implement referer blacklist
+- [ ] Add rate limiting per-IP
+- [ ] Add rate limiting per-origin
 
-- Blocked networks configuration (extend SSRF protection)
+### HTTP Response Handling
-- Rate limit global concurrent fetches (resource exhaustion)
+- [ ] Implement Last-Modified headers
-- EXIF/metadata stripping (privacy)
+- [ ] Implement Vary header for content negotiation
+- [ ] Implement X-Request-ID propagation
 
-P2, nice to have:
+### Additional Endpoints
+- [ ] Implement auto-format selection (format=auto based on Accept header)
 
-- Referer blacklist; per-IP and per-origin rate limiting
+### Configuration
-- Last-Modified headers; Vary header; X-Request-ID propagation
+- [ ] Add all configuration options from README
-- Auto-format selection (format=auto based on Accept header)
+- [ ] Implement environment variable overrides
-- All configuration options from README; env var overrides; YAML config
+- [ ] Implement YAML config file support
-  file support
+
-- Sentry error reporting (optional); comprehensive request logging;
+### Operational
-  Prometheus metrics
+- [ ] Implement Sentry error reporting (optional)
-- Integration tests for the image proxy flow; load tests for the
+- [ ] Add comprehensive request logging
-  1-5k req/s target
+- [ ] Add performance metrics (Prometheus)
-- Docs: configuration options, API endpoints, deployment guide, example
+- [ ] Write integration tests for image proxy flow
-  nginx/caddy reverse proxy config
+- [ ] Write load tests to verify 1-5k req/s target
+
+### Documentation
+- [ ] Document configuration options
+- [ ] Document API endpoints
+- [ ] Document deployment guide
+- [ ] Add example nginx/caddy reverse proxy config

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

scripts/manual-test.sh

@@ -48,7 +48,7 @@ fi
 
 # Test 3: Wrong password shows error
 echo "--- Test 3: Login with wrong password ---"
-WRONG_LOGIN=$(curl -sf -X POST "$BASE_URL/" -d "password=wrong-key" -c "$COOKIE_JAR")
+WRONG_LOGIN=$(curl -sf -X POST "$BASE_URL/" -d "key=wrong-key" -c "$COOKIE_JAR")
 if echo "$WRONG_LOGIN" | grep -qi "invalid\|error\|incorrect\|wrong"; then
     pass "Wrong password shows error message"
 else
@@ -57,7 +57,7 @@ fi
 
 # Test 4: Correct password redirects to generator
 echo "--- Test 4: Login with correct signing key ---"
-curl -sf -X POST "$BASE_URL/" -d "password=$SIGNING_KEY" -c "$COOKIE_JAR" -b "$COOKIE_JAR" -L -o /dev/null
+curl -sf -X POST "$BASE_URL/" -d "key=$SIGNING_KEY" -c "$COOKIE_JAR" -b "$COOKIE_JAR" -L -o /dev/null
 GENERATOR_PAGE=$(curl -sf "$BASE_URL/" -b "$COOKIE_JAR")
 if echo "$GENERATOR_PAGE" | grep -qi "generate\|url\|source\|logout"; then
     pass "Correct password shows generator page"
@@ -68,12 +68,12 @@ fi
 # Test 5: Generate encrypted URL
 echo "--- Test 5: Generate encrypted URL ---"
 GEN_RESULT=$(curl -sf -X POST "$BASE_URL/generate" -b "$COOKIE_JAR" \
-    -d "source_url=$TEST_IMAGE_URL" \
+    -d "url=$TEST_IMAGE_URL" \
     -d "width=800" \
     -d "height=600" \
     -d "format=jpeg" \
     -d "quality=85" \
-    -d "fit_mode=cover" \
+    -d "fit=cover" \
     -d "ttl=3600")
 if echo "$GEN_RESULT" | grep -q "/v1/e/"; then
     pass "Encrypted URL generated"
@@ -121,10 +121,10 @@ fi
 # Test 9: Generate short-TTL URL and verify expiration
 echo "--- Test 9: Expired URL returns 410 ---"
 # Login again
-curl -sf -X POST "$BASE_URL/" -d "password=$SIGNING_KEY" -c "$COOKIE_JAR" -b "$COOKIE_JAR" -L -o /dev/null
+curl -sf -X POST "$BASE_URL/" -d "key=$SIGNING_KEY" -c "$COOKIE_JAR" -b "$COOKIE_JAR" -L -o /dev/null
 # Generate URL with 1 second TTL
 GEN_RESULT=$(curl -sf -X POST "$BASE_URL/generate" -b "$COOKIE_JAR" \
-    -d "source_url=$TEST_IMAGE_URL" \
+    -d "url=$TEST_IMAGE_URL" \
     -d "width=100" \
     -d "height=100" \
     -d "format=jpeg" \