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.

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())