feat: proxmox idlewatcher (#88)

* feat: idle sleep for proxmox LXCs

* refactor: replace deprecated docker api types

* chore(api): remove debug task list endpoint

* refactor: move servemux to gphttp/servemux; favicon.go to v1/favicon

* refactor: introduce Pool interface, move agent_pool to agent module

* refactor: simplify api code

* feat: introduce debug api

* refactor: remove net.URL and net.CIDR types, improved unmarshal handling

* chore: update Makefile for debug build tag, update README

* chore: add gperr.Unwrap method

* feat: relative time and duration formatting

* chore: add ROOT_DIR environment variable, refactor

* migration: move homepage override and icon cache to $BASE_DIR/data, add migration code

* fix: nil dereference on marshalling service health

* fix: wait for route deletion

* chore: enhance tasks debuggability

* feat: stdout access logger and MultiWriter

* fix(agent): remove agent properly on verify error

* fix(metrics): disk exclusion logic and added corresponding tests

* chore: update schema and prettify, fix package.json and Makefile

* fix: I/O buffer not being shrunk before putting back to pool

* feat: enhanced error handling module

* chore: deps upgrade

* feat: better value formatting and handling

---------

Co-authored-by: yusing <yusing@6uo.me>

internal/net/ping_test.go

@@ -0,0 +1,23 @@
+package netutils
+
+import (
+	"context"
+	"errors"
+	"net"
+	"os"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestPing(t *testing.T) {
+	t.Run("localhost", func(t *testing.T) {
+		ok, err := Ping(context.Background(), net.ParseIP("127.0.0.1"))
+		// ping (ICMP) is not allowed for non-root users
+		if errors.Is(err, os.ErrPermission) {
+			t.Skip("permission denied")
+		}
+		require.NoError(t, err)
+		require.True(t, ok)
+	})
+}