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.env.example

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+# Copy to .env for local development (docker compose reads it automatically).
+
+# HTTP port the app listens on.
+PORT=8080
+
+# Display name shown in the UI / health payload.
+APP_NAME=Miabi Guestbook
+
+# Version shown in the UI / /api/info. Overrides the build-time version.
+# Set to different values per app (e.g. 1.0.0 vs 2.0.0) for a canary demo.
+# APP_VERSION=1.0.0
+
+# Seed sample entries on first run (only when the table is empty). Set to
+# false to start with an empty wall.
+SEED=true
+
+# === Database ======================
+# Driver: "postgres" or "sqlite". Leave unset to auto-detect: Postgres when
+# it is configured (DATABASE_URL or DB_HOST present), otherwise SQLite.
+# DB_DRIVER=postgres
+
+# SQLite (zero-config; used when no Postgres is configured). File path, or
+# ":memory:" for an ephemeral database. The parent directory is created on
+# startup. Locally this defaults to ./data/guestbook.db; the container image
+# uses /data/guestbook.db (a volume). On Miabi, mount a volume at /data.
+# DB_PATH=data/guestbook.db
+
+# Postgres — when you attach a Miabi managed database, Miabi injects these for
+# you. DATABASE_URL takes precedence; otherwise the discrete DB_* parts are
+# assembled into a DSN.
+DATABASE_URL=postgres://postgres:postgres@db:5432/guestbook?sslmode=disable
+
+# Discrete parts (used only when DATABASE_URL is empty):
+# DB_HOST=db
+# DB_PORT=5432
+# DB_USER=postgres
+# DB_PASSWORD=postgres
+# DB_NAME=guestbook
+# DB_SSL_MODE=disable