make: use Golang build and module cache for linter

This commit gives the linter container access to the local machine's
build and module cache, drastically decreasing the run time of
subsequent linter runs (no difference on first run with this change).

Author: guggero

Makefile

@@ -63,7 +63,11 @@ ifneq ($(workers),)
 LINT_WORKERS = --concurrency=$(workers)
 endif
 
-DOCKER_TOOLS = docker run --rm -v $$(pwd):/build lnd-tools
+DOCKER_TOOLS = docker run \
+  --rm \
+  -v $(shell bash -c "go env GOCACHE || (mkdir -p /tmp/go-cache; echo /tmp/go-cache)"):/tmp/build/.cache \
+  -v $(shell bash -c "go env GOMODCACHE || (mkdir -p /tmp/go-modcache; echo /tmp/go-modcache)"):/tmp/build/.modcache \
+  -v $$(pwd):/build lnd-tools
 
 GREEN := "\\033[0;32m"
 NC := "\\033[0m"