feat(platform): add production CI and containers

.env.compose.example

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+# Production Compose example only. Store the real file outside the repository with mode 0600.
+# Use an immutable sha-<full-commit> tag. The moving main tag is for convenience, not rollback.
+LAB_IMAGE=git.sechmachine.io.vn/sechmachine/labtimesheet:sha-replace-with-full-commit
+
+# The app is intended to sit behind an HTTPS reverse proxy on the same host.
+LAB_HTTP_BIND=127.0.0.1
+LAB_HTTP_PORT=8080
+LAB_PUBLIC_ORIGIN=https://timesheet.example.edu
+LAB_FORWARD_HEADERS_STRATEGY=framework
+LAB_SECURITY_MASTER_KEY=replace-with-base64-encoded-32-byte-key
+
+# Bundled mode uses the Compose service name. For external mode, replace this URL and credentials.
+LAB_DB_URL=jdbc:postgresql://postgres:5432/labtimesheet
+LAB_DB_USERNAME=labtimesheet
+LAB_DB_PASSWORD=replace-with-database-password
+
+# Used only when the bundled-db profile is enabled.
+POSTGRES_DB=labtimesheet
+POSTGRES_USER=labtimesheet
+POSTGRES_PASSWORD=replace-with-the-same-database-password