feat: Improve output for dockerfile instructions

This commit allows for use of the installCommand extracted
from a RUN instruction in newer versions of the SDP.

[CAP-280]

src/lib/snyk-test/run-test.ts

@@ -445,7 +445,7 @@ async function parseRes(
       const dockerfilePackage = dockerfilePackages[vuln.name.split('/')[0]];
       if (dockerfilePackage) {
         (vuln as DockerIssue).dockerfileInstruction =
-          dockerfilePackage.instruction;
+          dockerfilePackage.installCommand ?? dockerfilePackage.instruction;
       }
       (vuln as DockerIssue).dockerBaseImage = res.docker!.baseImage;
       return vuln;