[#1036] Makefile: Add missing comments

Signed-off-by: Evgenii Stratonikov <e.stratonikov@yadro.com>

Makefile

@@ -115,6 +115,7 @@ protoc:
 			--go-grpc_out=. --go-grpc_opt=paths=source_relative $$f; \
 	done
 
+# Install protoc
 protoc-install:
 	@rm -rf $(PROTOBUF_DIR)
 	@mkdir $(PROTOBUF_DIR)
@@ -161,6 +162,7 @@ imports:
 	@echo "⇒ Processing goimports check"
 	@goimports -w cmd/ pkg/ misc/
 
+# Run gofumpt
 fumpt:
 	@echo "⇒ Processing gofumpt check"
 	@gofumpt -l -w cmd/ pkg/ misc/
@@ -170,6 +172,7 @@ test:
 	@echo "⇒ Running go test"
 	@go test ./... -count=1
 
+# Run pre-commit
 pre-commit-run:
 	@pre-commit run -a --hook-stage manual
 
@@ -205,11 +208,13 @@ staticcheck-run:
 	fi
 	@$(STATICCHECK_VERSION_DIR)/staticcheck ./...
 
+# Install gopls
 gopls-install:
 	@rm -rf $(GOPLS_DIR)
 	@mkdir $(GOPLS_DIR)
 	@GOBIN=$(GOPLS_VERSION_DIR) go install golang.org/x/tools/gopls@$(GOPLS_VERSION)
 
+# Run gopls
 gopls-run:
 	@if [ ! -d "$(GOPLS_VERSION_DIR)" ]; then \
 		make gopls-install; \
@@ -253,13 +258,16 @@ debpackage:
 			"Please see CHANGELOG.md for code changes for $(VERSION)"
 	dpkg-buildpackage --no-sign -b
 
+# Cleanup deb package build directories
 debclean:
 	dh clean
 
+# Download locode database
 locode-download:
 	@wget -q -O ./.cache/locode_db.gz 'https://git.frostfs.info/TrueCloudLab/frostfs-locode-db/releases/download/${LOCODE_DB_VERSION}/locode_db.gz'
 	gzip -dfk ./.cache/locode_db.gz
 
+# Start dev environment
 env-up: all
 	docker compose -f dev/docker-compose.yml up -d
 	@if [ ! -d "$(FROSTFS_CONTRACTS_PATH)" ]; then \
@@ -271,6 +279,7 @@ env-up: all
 		make locode-download; \
 	fi
 
+# Shutdown dev environment
 env-down:
 	docker compose -f dev/docker-compose.yml down
 	docker volume rm -f frostfs-node_neo-go