Add postgres 18

Signed-off-by: souravbiswassanto <saurov@appscode.com>

Author: souravbiswassanto

Makefile

@@ -58,8 +58,8 @@ BIN_PLATFORMS    := $(DOCKER_PLATFORMS)
 OS   := $(if $(GOOS),$(GOOS),$(shell go env GOOS))
 ARCH := $(if $(GOARCH),$(GOARCH),$(shell go env GOARCH))
 
-BASEIMAGE_PROD   ?= postgres:15.1-alpine
-BASEIMAGE_DBG    ?= postgres:15.1
+BASEIMAGE_PROD   ?= postgres:18.2-alpine
+BASEIMAGE_DBG    ?= postgres:18.2
 
 IMAGE            := $(REGISTRY)/$(BIN)
 VERSION_PROD     := $(VERSION)