update docs related to licence key changes (#81)

Author: gnmahanth

README.md

@@ -14,17 +14,30 @@ Every [release](https://github.com/deepfence/package-scanner/releases) of packag
 
 ## Usage
 
+Run this command to generate a license key. Work/official email id has to be used.
+```shell
+curl https://license.deepfence.io/threatmapper/generate-license?first_name=<FIRST_NAME>&last_name=<LAST_NAME>&email=<EMAIL>&company=<ORGANIZATION_NAME>&resend_email=true
+```
+
 ### Image scan
+Set product and licence key to download the vulnerability database needed for the scan 
+
 ```shell
 docker pull longhornio/csi-snapshotter:v6.2.1
+export DEEPFENCE_PRODUCT=<ThreatMapper or ThreatStryker>
+export DEEPFENCE_LICENSE=<ThreatMapper or ThreatStryker license key>
 ./package-scanner -source longhornio/csi-snapshotter:v6.2.1 -container-runtime docker
 
 docker pull nginx:latest
+export DEEPFENCE_PRODUCT=<ThreatMapper or ThreatStryker>
+export DEEPFENCE_LICENSE=<ThreatMapper or ThreatStryker license key>
 ./package-scanner -source nginx:latest -severity critical
 ```
 
 ### Directory scan
 ```shell
+export DEEPFENCE_PRODUCT=<ThreatMapper or ThreatStryker>
+export DEEPFENCE_LICENSE=<ThreatMapper or ThreatStryker license key>
 ./package-scanner --source dir:<directory full path>
 ```
 
@@ -46,5 +59,5 @@ nginx                                               latest    1403e55ab369   8 d
 ## Docker image standalone usage example
 ```
 docker pull nginx:latest
-docker run -it --rm -v /var/run/docker.sock:/var/run/docker.sock --name package-scanner quay.io/deepfenceio/deepfence_package_scanner_cli:2.5.0 -source nginx:latest
+docker run -it --rm -e DEEPFENCE_PRODUCT=<ThreatMapper or ThreatStryker> -e DEEPFENCE_LICENSE=<ThreatMapper or ThreatStryker license key> -v /var/run/docker.sock:/var/run/docker.sock --name package-scanner quay.io/deepfenceio/deepfence_package_scanner_cli:2.5.0 -source nginx:latest
 ```

main.go

@@ -35,6 +35,8 @@ var (
 	severities       = []string{utils.CRITICAL, utils.HIGH, utils.MEDIUM, utils.LOW}
 	productENV       = utils.GetEnvOrDefault("DEEPFENCE_PRODUCT", "ThreatMapper")
 	licenseENV       = utils.GetEnvOrDefault("DEEPFENCE_LICENSE", "")
+	dfConsoleURL     = utils.GetEnvOrDefault("DEEPFENCE_MGMT_CONSOLE_URL", "")
+	dfKey            = utils.GetEnvOrDefault("DEEPFENCE_KEY", "")
 	version          string
 	userCacheDir     string
 )
@@ -50,10 +52,10 @@ var (
 	port                = flag.String("port", "", "Port for grpc server")
 	output              = flag.String("output", utils.TableOutput, "Output format: json or table")
 	quiet               = flag.Bool("quiet", false, "Don't display any output in stdout")
-	consoleURL          = flag.String("console-url", "", "Deepfence Management Console URL")
+	consoleURL          = flag.String("console-url", dfConsoleURL, "Deepfence Management Console URL")
 	consolePort         = flag.Int("console-port", 443, "Deepfence Management Console Port")
 	vulnerabilityScan   = flag.Bool("vulnerability-scan", false, "Publish SBOM to Deepfence Management Console and run Vulnerability Scan")
-	deepfenceKey        = flag.String("deepfence-key", "", "Deepfence key for auth")
+	deepfenceKey        = flag.String("deepfence-key", dfKey, "Deepfence key for auth")
 	source              = flag.String("source", "", "Image name (nginx:latest) or directory (dir:/)")
 	scanType            = flag.String("scan-type", "base,java,python,ruby,php,javascript,rust,rust-binary,golang,golang-binary,dotnet", "base,java,python,ruby,php,javascript,rust,rust-binary,golang,golang-binary,dotnet")
 	scanID              = flag.String("scan-id", "", "(Optional) Scan id")