Steem Docker images now support LOWMEM node

Steem Docker images now contain both FULL and LOWMEM nodes:

• /usr/local/bin/steemd - Full node executable (default)
• /usr/local/bin/steemd_lowmem - Low memory node executable
• /usr/local/bin/cli_wallet - Command line interface

Executable can be specified by the STEEMD_EXEC environment variable, for example:

docker run -e "STEEMD_EXEC=/usr/local/bin/steemd_lowmem" teego/steem-wallet

or as a command of a container:

docker run teego/steem-wallet /usr/local/bin/steemd_lowmem

Supported tags

Tags	Version	Base Image
latest, 0.13.0, 0.13.0-Ubuntu-xenial	0.13.0	Ubuntu 16.04 (Xenial)
0.13.0-Ubuntu-trusty	0.13.0	Ubuntu 14.04 (Trusty)
0.13.0-Debian-jessie	0.13.0	Debian 8.5 (Jessie)