feat: add auto db migration in binary

.build/Dockerfile

@@ -1,5 +1,5 @@
 # Copyright 2026 Beacon Contributors
-# SPDX-License-Identifier: agpl
+# SPDX-License-Identifier: AGPL-3.0-or-later
 
 FROM golang:1.26-alpine AS builder
 WORKDIR /app
@@ -9,10 +9,7 @@ COPY . .
 RUN go build -o beacon ./cmd/beacon
 
 FROM alpine:3.19
-RUN apk add --no-cache ca-certificates tzdata postgresql-client
+RUN apk add --no-cache ca-certificates tzdata
 WORKDIR /app
 COPY --from=builder /app/beacon .
-COPY db/migrations/ ./migrations/
-COPY .build/docker-entrypoint.sh .
-RUN chmod +x docker-entrypoint.sh
-ENTRYPOINT ["./docker-entrypoint.sh"]
+CMD ["./beacon"]

.build/docker-entrypoint.sh

@@ -1,30 +0,0 @@
-#!/bin/sh
-# Copyright 2026 Beacon Contributors
-# SPDX-License-Identifier: agpl
-
-set -e
-
-if [ -n "$POSTGRES_DSN" ]; then
-  echo "Running database migrations..."
-
-  psql "$POSTGRES_DSN" -c "CREATE TABLE IF NOT EXISTS schema_migrations (
-    filename TEXT PRIMARY KEY,
-    applied_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
-  );"
-
-  for f in /app/migrations/*.sql; do
-    name=$(basename "$f")
-    already=$(psql "$POSTGRES_DSN" -tAc "SELECT 1 FROM schema_migrations WHERE filename = '$name'")
-    if [ "$already" != "1" ]; then
-      echo "  Applying $name..."
-      psql "$POSTGRES_DSN" -f "$f"
-      psql "$POSTGRES_DSN" -c "INSERT INTO schema_migrations (filename) VALUES ('$name');"
-    else
-      echo "  Skipping $name (already applied)"
-    fi
-  done
-
-  echo "Migrations complete."
-fi
-
-exec ./beacon "$@"

cmd/beacon/main.go

@@ -114,6 +114,10 @@ func main() {
 	}
 	defer pool.Close()
 
+	if err := db.RunMigrations(ctx, pool); err != nil {
+		log.Fatalf("migrations failed: %v", err)
+	}
+
 	store := db.New(pool)
 
 	// ── Redis cache layer ────────────────────────────────────────────────────

db/migrate.go

@@ -0,0 +1,78 @@
+// Copyright 2026 Beacon Contributors
+// SPDX-License-Identifier: AGPL-3.0-or-later
+
+package db
+
+import (
+	"context"
+	"embed"
+	"fmt"
+	"io/fs"
+	"sort"
+	"strings"
+
+	"github.com/jackc/pgx/v5/pgxpool"
+)
+
+//go:embed migrations/*.sql
+var migrationFiles embed.FS
+
+func RunMigrations(ctx context.Context, pool *pgxpool.Pool) error {
+	_, err := pool.Exec(ctx, `
+		CREATE TABLE IF NOT EXISTS schema_migrations (
+			filename TEXT PRIMARY KEY,
+			applied_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
+		)
+	`)
+	if err != nil {
+		return fmt.Errorf("failed to create schema_migrations: %w", err)
+	}
+
+	entries, err := fs.ReadDir(migrationFiles, "migrations")
+	if err != nil {
+		return fmt.Errorf("failed to read migrations: %w", err)
+	}
+
+	sort.Slice(entries, func(i, j int) bool {
+		return entries[i].Name() < entries[j].Name()
+	})
+
+	for _, entry := range entries {
+		if !strings.HasSuffix(entry.Name(), ".sql") {
+			continue
+		}
+		var already bool
+		err := pool.QueryRow(
+			ctx,
+			"SELECT EXISTS(SELECT 1 FROM schema_migrations WHERE filename = $1)",
+			entry.Name(),
+		).Scan(&already)
+		if err != nil {
+			return fmt.Errorf("failed to check migration %s: %w", entry.Name(), err)
+		}
+		if already {
+			continue
+		}
+
+		sql, err := migrationFiles.ReadFile("migrations/" + entry.Name())
+		if err != nil {
+			return fmt.Errorf("failed to read migration %s: %w", entry.Name(), err)
+		}
+
+		if _, err := pool.Exec(ctx, string(sql)); err != nil {
+			return fmt.Errorf("failed to apply migration %s: %w", entry.Name(), err)
+		}
+
+		if _, err := pool.Exec(
+			ctx,
+			"INSERT INTO schema_migrations (filename) VALUES ($1)",
+			entry.Name(),
+		); err != nil {
+			return fmt.Errorf("failed to record migration %s: %w", entry.Name(), err)
+		}
+
+		fmt.Printf("applied migration: %s\n", entry.Name())
+	}
+
+	return nil
+}