diff --git a/wikijs/README.txt b/wikijs/README.txt
index 092ce7a..663f234 100644
--- a/wikijs/README.txt
+++ b/wikijs/README.txt
@@ -19,6 +19,7 @@ HTTP_PORT       - Web interface port (default: 3080)
 PUID            - User ID for file permissions (default: 1000)
 PGID            - Group ID for file permissions (default: 1000)
 TZ              - Timezone (default: Pacific/Auckland)
+DB_TYPE         - Database type: sqlite or postgres (default: sqlite)
 
 Ports
 -----
@@ -44,10 +45,19 @@ You will be guided through the initial setup wizard to:
 Database
 --------
 
-By default, Wiki.js uses SQLite which requires no additional setup.
-For PostgreSQL support, configure the database settings in the
-Wiki.js admin panel after initial setup, or edit the config.yml
-file directly in DATA_PATH/config/.
+By default, Wiki.js uses SQLite (DB_TYPE=sqlite) which requires no
+additional setup and stores data in DATA_PATH/data/.
+
+For PostgreSQL support, set DB_TYPE=postgres and configure these
+additional environment variables in service.env:
+  DB_HOST  - PostgreSQL server hostname
+  DB_PORT  - PostgreSQL server port (default: 5432)
+  DB_NAME  - Database name
+  DB_USER  - Database username
+  DB_PASS  - Database password
+
+Note: Database settings only apply on first run. After initial setup,
+modify DATA_PATH/config/config.yml directly.
 
 Backup & Restore
 ----------------
diff --git a/wikijs/config/service.env b/wikijs/config/service.env
index 9a1edfc..60b54b8 100644
--- a/wikijs/config/service.env
+++ b/wikijs/config/service.env
@@ -16,3 +16,6 @@ HTTP_PORT=3080
 PUID=1000
 PGID=1000
 TZ="Pacific/Auckland"
+
+# Database configuration (sqlite requires no external database)
+DB_TYPE="sqlite"
diff --git a/wikijs/start.sh b/wikijs/start.sh
index 666233e..8dc557d 100755
--- a/wikijs/start.sh
+++ b/wikijs/start.sh
@@ -1,6 +1,6 @@
 #!/bin/bash
 source "${AGENT_PATH}/common.sh"
-_check_required_env_vars "CONTAINER_NAME" "IMAGE_REGISTRY" "IMAGE_REPO" "IMAGE_TAG" "DATA_PATH" "HTTP_PORT" "PUID" "PGID" "TZ"
+_check_required_env_vars "CONTAINER_NAME" "IMAGE_REGISTRY" "IMAGE_REPO" "IMAGE_TAG" "DATA_PATH" "HTTP_PORT" "PUID" "PGID" "TZ" "DB_TYPE"
 
 # START SCRIPT
 # The start script is required for all templates.
@@ -15,6 +15,7 @@ DOCKER_RUN_CMD="docker run -d \
                 -e PUID=${PUID} \
                 -e PGID=${PGID} \
                 -e TZ=${TZ} \
+                -e DB_TYPE=${DB_TYPE} \
                 ${IMAGE_REGISTRY}/${IMAGE_REPO}:${IMAGE_TAG}"
 
 if ! _create_and_start_container "$DOCKER_RUN_CMD" "$CONTAINER_NAME"; then