Feat: Env variables to set health timeouts

- HEALTH_OPENVPN_DURATION_INITIAL
- HEALTH_OPENVPN_DURATION_ADDITION

internal/configuration/health.go

@@ -0,0 +1,41 @@
+package configuration
+
+import (
+	"strings"
+
+	"github.com/qdm12/golibs/params"
+)
+
+// Health contains settings for the healthcheck and health server.
+type Health struct {
+	OpenVPN HealthyWait
+}
+
+func (settings *Health) String() string {
+	return strings.Join(settings.lines(), "\n")
+}
+
+func (settings *Health) lines() (lines []string) {
+	lines = append(lines, lastIndent+"Health:")
+
+	lines = append(lines, indent+lastIndent+"OpenVPN:")
+	for _, line := range settings.OpenVPN.lines() {
+		lines = append(lines, indent+indent+line)
+	}
+
+	return lines
+}
+
+func (settings *Health) read(r reader) (err error) {
+	settings.OpenVPN.Initial, err = r.env.Duration("HEALTH_OPENVPN_DURATION_INITIAL", params.Default("6s"))
+	if err != nil {
+		return err
+	}
+
+	settings.OpenVPN.Addition, err = r.env.Duration("HEALTH_OPENVPN_DURATION_ADDITION", params.Default("5s"))
+	if err != nil {
+		return err
+	}
+
+	return nil
+}