Update ca certificates locations and instructions

Author: nmaguiar

MITM.md

@@ -21,7 +21,20 @@ export https_proxy=http://127.0.0.1:8080
 
 ### Others
 
-Check: https://docs.mitmproxy.org/stable/concepts-certificates/#installing-the-mitmproxy-ca-certificate-manually
+Common linux distributions ca certificates location:
+
+| Distribution | Location | Java Location |
+|--------------|----------|---------------d|
+| Alpine       | /etc/ssl/certs/ca-certificates.crt | /etc/ssl/certs/java/cacerts |
+| RedHat-based | /etc/pki/tls/certs/ca-bundle.crt | /etc/pki/java/cacerts |
+| Debian-based | /etc/ssl/certs/ca-certificates.crt | /etc/ssl/certs/java/cacerts |
+ 
+You can retrieve these files using OpenAF's oJob _ojob.io/docker/expand_ to extract, append the _mitm_ certificate and then overwrite it on the image (using ojob.io/docker/collapse_ or a K8s config map or similar method).
+
+> You can append _/home/mitm/.mitmproxy/mitmproxy-ca-cert.pem_ to these ca certificates crt files.
+> For Java you need to use _key-tool_ or OpenAF's oJob _ojob.io/java/certs_. Depending on the image the cacerts file might be located in _[java home]/lib/security/cacerts_.
+
+Check also: https://docs.mitmproxy.org/stable/concepts-certificates/#installing-the-mitmproxy-ca-certificate-manually
 
 ## Usage