feat: add Docker Compose deployment and serve assets via StaticFS

Embed full assets directory and serve with via's StaticFS instead of a
custom HTTP handler. Move SQLite DB to data/c4.db for clean volume
mounting. Add multi-stage Dockerfile, docker-compose.yml, and
.dockerignore.

.dockerignore

@@ -0,0 +1,10 @@
+c4
+c4.db
+data/
+deploy/
+.env
+.git
+.gitignore
+assets/css/output.css
+c4-deploy-*.tar.gz
+c4-deploy-*_b64*.txt

Dockerfile

@@ -0,0 +1,29 @@
+FROM golang:1.25.4-bookworm AS build
+
+WORKDIR /src
+COPY go.mod go.sum ./
+RUN go mod download
+
+COPY . .
+RUN go tool gotailwind -i assets/css/input.css -o assets/css/output.css --minify
+RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -o /c4 .
+
+FROM debian:bookworm-slim
+
+RUN apt-get update && \
+    apt-get install -y --no-install-recommends ca-certificates wget && \
+    rm -rf /var/lib/apt/lists/*
+
+COPY --from=build /c4 /usr/local/bin/c4
+
+WORKDIR /app
+RUN mkdir data && chown games:games data
+
+USER games
+
+EXPOSE 8080
+
+HEALTHCHECK --interval=30s --timeout=5s --start-period=5s --retries=3 \
+    CMD wget -qO /dev/null http://localhost:8080/
+
+CMD ["c4"]

docker-compose.yml

@@ -0,0 +1,17 @@
+services:
+  c4:
+    build: .
+    container_name: c4
+    restart: unless-stopped
+    ports:
+      - "8080:8080"
+    env_file:
+      - path: .env
+        required: false
+    environment:
+      - PORT=8080
+    volumes:
+      - c4-data:/app/data
+
+volumes:
+  c4-data:

main.go

@@ -4,11 +4,11 @@ import (
 	"context"
 	"crypto/md5"
 	"database/sql"
-	_ "embed"
+	"embed"
 	"encoding/hex"
 	"encoding/json"
+	"io/fs"
 	"log"
-	"net/http"
 	"os"
 	"sync"
 	"time"
@@ -32,17 +32,14 @@ var (
 	queries    *gen.Queries
 )
 
-//go:embed assets/css/output.css
-var daisyUICSS []byte
+//go:embed assets
+var assets embed.FS
 
 func DaisyUIPlugin(v *via.V) {
-	sum := md5.Sum(daisyUICSS)
+	css, _ := fs.ReadFile(assets, "assets/css/output.css")
+	sum := md5.Sum(css)
 	version := hex.EncodeToString(sum[:4])
-	v.HTTPServeMux().HandleFunc("GET /_plugins/daisyui/style.css", func(w http.ResponseWriter, r *http.Request) {
-		w.Header().Set("Content-Type", "text/css")
-		_, _ = w.Write(daisyUICSS)
-	})
-	v.AppendToHead(h.Link(h.Rel("stylesheet"), h.Href("/_plugins/daisyui/style.css?v="+version)))
+	v.AppendToHead(h.Link(h.Rel("stylesheet"), h.Href("/assets/css/output.css?v="+version)))
 }
 
 func port() string {
@@ -55,7 +52,10 @@ func port() string {
 func main() {
 	_ = godotenv.Load()
 
-	if err := db.Init("c4.db"); err != nil {
+	if err := os.MkdirAll("data", 0o755); err != nil {
+		log.Fatal(err)
+	}
+	if err := db.Init("data/c4.db"); err != nil {
 		log.Fatal(err)
 	}
 	queries = gen.New(db.DB)
@@ -76,6 +76,9 @@ func main() {
 		Plugins:        []via.Plugin{DaisyUIPlugin},
 	})
 
+	subFS, _ := fs.Sub(assets, "assets")
+	v.StaticFS("/assets/", subFS)
+
 	store.SetPubSub(v.PubSub())
 	snakeStore.SetPubSub(v.PubSub())