merge and produce swagger in contrib/

Makefile

@@ -3,6 +3,7 @@
 CMD_NAME := go-server-with-otel
 VERSION ?= development
 API_DIR := api/
+SCHEMA_DIR := contrib/
 PROTO_DIRS := $(wildcard proto/demo/app/*) # TODO: Update path (probably not demo)
 PLATFORMS := linux/amd64 linux/arm64 darwin/amd64 darwin/arm64
 OUTPUT_DIR := bin
@@ -16,7 +17,9 @@ proto: check_protoc $(API_DIR)
 		--go_out=$(API_DIR) --go_opt=paths=source_relative \
 		--go-grpc_out=$(API_DIR) --go-grpc_opt=paths=source_relative \
 		--grpc-gateway_out=$(API_DIR) --grpc-gateway_opt=paths=source_relative \
-		--openapiv2_out=$(API_DIR) \
+		--openapiv2_out=$(SCHEMA_DIR) \
+		--openapiv2_opt allow_merge=true \
+		--openapiv2_opt merge_file_name=$(CMD_NAME) \
 		$(foreach dir, $(PROTO_DIRS), $(wildcard $(dir)/*.proto))
 
 test: