Feat: Add pg_bigm for keyword search in pgvector (#13876)

Signed-off-by: Yuichiro Utsumi <utsumi.yuichiro@fujitsu.com>

docker/docker-compose.yaml

@@ -157,6 +157,8 @@ x-shared-env: &shared-api-worker-env
   PGVECTOR_DATABASE: ${PGVECTOR_DATABASE:-dify}
   PGVECTOR_MIN_CONNECTION: ${PGVECTOR_MIN_CONNECTION:-1}
   PGVECTOR_MAX_CONNECTION: ${PGVECTOR_MAX_CONNECTION:-5}
+  PGVECTOR_PG_BIGM: ${PGVECTOR_PG_BIGM:-false}
+  PGVECTOR_PG_BIGM_VERSION: ${PGVECTOR_PG_BIGM_VERSION:-1.2-20240606}
   PGVECTO_RS_HOST: ${PGVECTO_RS_HOST:-pgvecto-rs}
   PGVECTO_RS_PORT: ${PGVECTO_RS_PORT:-5432}
   PGVECTO_RS_USER: ${PGVECTO_RS_USER:-postgres}
@@ -741,8 +743,13 @@ services:
       POSTGRES_DB: ${PGVECTOR_POSTGRES_DB:-dify}
       # postgres data directory
       PGDATA: ${PGVECTOR_PGDATA:-/var/lib/postgresql/data/pgdata}
+      # pg_bigm module for full text search
+      PG_BIGM: ${PGVECTOR_PG_BIGM:-false}
+      PG_BIGM_VERSION: ${PGVECTOR_PG_BIGM_VERSION:-1.2-20240606}
     volumes:
       - ./volumes/pgvector/data:/var/lib/postgresql/data
+      - ./pgvector/docker-entrypoint.sh:/docker-entrypoint.sh
+    entrypoint: [ '/docker-entrypoint.sh' ]
     healthcheck:
       test: [ 'CMD', 'pg_isready' ]
       interval: 1s