refactor: adopt portigo infrastructure patterns

Add config package with build-tag-switched dev/prod environments,
structured logging via zerolog, Taskfile for dev workflow, golangci-lint
config, testutil package, and improved DB setup with proper SQLite
pragmas and cleanup. Rename sqlc output package from gen to repository.

Switch to allowlist .gitignore, Alpine+UPX+scratch Dockerfile, and
CI pipeline with test/lint gates before deploy.

main.go

@@ -8,20 +8,20 @@ import (
 	"encoding/hex"
 	"encoding/json"
 	"io/fs"
-	"log"
-	"os"
 	"sync"
 	"time"
 
-	"github.com/google/uuid"
-	"github.com/joho/godotenv"
-
 	"github.com/ryanhamamura/c4/auth"
+	"github.com/ryanhamamura/c4/config"
 	"github.com/ryanhamamura/c4/db"
-	"github.com/ryanhamamura/c4/db/gen"
+	"github.com/ryanhamamura/c4/db/repository"
 	"github.com/ryanhamamura/c4/game"
+	"github.com/ryanhamamura/c4/logging"
 	"github.com/ryanhamamura/c4/snake"
 	"github.com/ryanhamamura/c4/ui"
+
+	"github.com/google/uuid"
+	"github.com/rs/zerolog/log"
 	"github.com/ryanhamamura/via"
 	"github.com/ryanhamamura/via/h"
 )
@@ -29,7 +29,7 @@ import (
 var (
 	store         = game.NewGameStore()
 	snakeStore    = snake.NewSnakeStore()
-	queries       *gen.Queries
+	queries       *repository.Queries
 	chatPersister *db.ChatPersister
 )
 
@@ -43,39 +43,35 @@ func DaisyUIPlugin(v *via.V) {
 	v.AppendToHead(h.Link(h.Rel("stylesheet"), h.Href("/assets/css/output.css?v="+version)))
 }
 
-func port() string {
-	if p := os.Getenv("PORT"); p != "" {
-		return p
-	}
-	return "7331"
-}
-
 func main() {
-	_ = godotenv.Load()
+	cfg := config.Global
+	logger := logging.SetupLogger(cfg.Environment, cfg.LogLevel)
 
-	if err := os.MkdirAll("data", 0o755); err != nil {
-		log.Fatal(err)
+	cleanupDB, err := db.Init(cfg.DBPath)
+	if err != nil {
+		log.Fatal().Err(err).Msg("initializing database")
 	}
-	if err := db.Init("data/c4.db"); err != nil {
-		log.Fatal(err)
-	}
-	queries = gen.New(db.DB)
+	defer cleanupDB()
+
+	queries = repository.New(db.DB)
 	store.SetPersister(db.NewGamePersister(queries))
 	snakeStore.SetPersister(db.NewSnakePersister(queries))
 	chatPersister = db.NewChatPersister(queries)
 
 	sessionManager, err := via.NewSQLiteSessionManager(db.DB)
 	if err != nil {
-		log.Fatal(err)
+		log.Fatal().Err(err).Msg("creating session manager")
 	}
 
+	_ = logger
+
 	v := via.New()
 	v.Config(via.Options{
-		LogLevel:            via.LogLevelDebug,
-		DocumentTitle:       "Game Lobby",
-		ServerAddress:       ":" + port(),
-		SessionManager:      sessionManager,
-		Plugins:             []via.Plugin{DaisyUIPlugin},
+		LogLevel:       via.LogLevelDebug,
+		DocumentTitle:  "Game Lobby",
+		ServerAddress:  ":" + cfg.Port,
+		SessionManager: sessionManager,
+		Plugins:        []via.Plugin{DaisyUIPlugin},
 	})
 
 	subFS, _ := fs.Sub(assets, "assets")
@@ -315,7 +311,7 @@ func main() {
 
 			ctx := context.Background()
 			id := uuid.New().String()
-			user, err := queries.CreateUser(ctx, gen.CreateUserParams{
+			user, err := queries.CreateUser(ctx, repository.CreateUserParams{
 				ID:           id,
 				Username:     username.String(),
 				PasswordHash: hash,