Switch the docker image to use AL instead of ubuntu

Motivation:

Motivation

Ubuntu has some un-patched CVEs
Issue number: #68

Testing

Built the image locally sudo ./docker-build.sh
Attached my terminal to the docker container docker run -it aws-iot-securetunneling-localproxy:latest /bin/bash

Ensured localproxy is running successfully.

bash-4.2# ./localproxy -h
Allowed options:
-h [ --help ]                   Show help message
-t [ --access-token ] arg       Client access token
-e [ --proxy-endpoint ] arg     Endpoint of proxy server with port (if not 
                              default 443). Example: data.tunneling.iot.us-
                              east-1.amazonaws.com:443
-r [ --region ] arg             Endpoint region where tunnel exists. Mutually
                              exclusive flag with --proxy-endpoint
-s [ --source-listen-port ] arg Sets the mappings between source listening 
                              ports and service identifier. Example: 
                              SSH1=5555 or 5555
-d [ --destination-app ] arg    Sets the mappings between the 
                              endpoint(address:port/port) and service 
                              identifier. Example: SSH1=127.0.0.1:22 or 22
-b [ --local-bind-address ] arg Assigns a specific local address to bind to 
                              for listening in source mode or a local 
                              socket address for destination mode.
-c [ --capath ] arg             Adds the directory containing certificate 
                              authority files to be used for performing 
                              verification
-k [ --no-ssl-host-verify ]     Turn off SSL host verification
--export-default-settings arg   Exports the default settings for the TCP 
                              adapter to the given file as json and exit 
                              program
--settings-json arg             Use the input JSON file to apply fine grained
                              settings.
--config arg                    Use the supplied configuration file to apply 
                              CLI args. Actual CLI args override the 
                              contents of this file
-v [ --verbose ] arg (=4)       Logging level to standard out. [0, 255] 
                              (0=off, 1=fatal, 2=error, 3=warning, 4=info, 
                              5=debug, >=6=trace)
-m [ --mode ] arg               The mode local proxy will run: src(source) or
                              dst(destination)
--config-dir arg                Set the configuration directory where service
                              identifier mappings are stored. If not 
                              specified, will read mappings from default 
                              directory ./config (same directory where 
                              local proxy binary is running)

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aws-samples / aws-iot-securetunneling-localproxy

Switch the docker image to use AL instead of ubuntu #70

Motivation

Testing