Initial multi-tenant blog host

Go + Postgres application serving a management dashboard on the base
domain and one public blog per subdomain. Markdown posts organised in
pages, form-based theme customisation, image uploads stored in Postgres,
JWT cookie sessions with CSRF, superadmin user management, RSS feeds.
Docker/compose deployment and a Makefile-driven dev environment with
seed data.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Sd8UPWrvyYCLj97JexNw3A

1 files changed, 43 insertions, 0 deletions

diff --git a/internal/db/db.go b/internal/db/db.go
new file mode 100644
index 0000000..44d489b
--- /dev/null
+++ b/internal/db/db.go
@@ -0,0 +1,43 @@
+// Package db opens the Postgres pool and applies embedded migrations.
+package db
+
+import (
+	"context"
+	"database/sql"
+	"embed"
+	"fmt"
+
+	"github.com/jackc/pgx/v5/pgxpool"
+	_ "github.com/jackc/pgx/v5/stdlib"
+	"github.com/pressly/goose/v3"
+)
+
+//go:embed migrations/*.sql
+var migrations embed.FS
+
+func Open(ctx context.Context, url string) (*pgxpool.Pool, error) {
+	pool, err := pgxpool.New(ctx, url)
+	if err != nil {
+		return nil, fmt.Errorf("connect: %w", err)
+	}
+	if err := pool.Ping(ctx); err != nil {
+		pool.Close()
+		return nil, fmt.Errorf("ping: %w", err)
+	}
+	return pool, nil
+}
+
+// Migrate applies all pending migrations using goose over database/sql.
+func Migrate(ctx context.Context, url string) error {
+	sqldb, err := sql.Open("pgx", url)
+	if err != nil {
+		return err
+	}
+	defer sqldb.Close()
+	goose.SetBaseFS(migrations)
+	goose.SetLogger(goose.NopLogger())
+	if err := goose.SetDialect("postgres"); err != nil {
+		return err
+	}
+	return goose.UpContext(ctx, sqldb, "migrations")
+}