`nullmailer` replaced with `msmtp`

Nullmailer is unstable with Microsoft Exchange. Replacing with msmtp.
Environment variables replaced.

Consistency release

• php-7 moved to php-7.1
• request explicit version when installing php-7

Artifacts:
docker pull dalee/baseimage:v0.3.0
docker pull dalee/php-5.6:v0.3.0
docker pull dalee/php-7.1:v0.3.0
docker pull dalee/nodejs-6:v0.3.0

php 7.1

PHP 7.1 image included.

Artifacts:

• docker pull dalee/baseimage:v0.2.0
• docker pull dalee/php-5.6:v0.2.0
• docker pull dalee/php-7:v0.2.0
• docker pull dalee/nodejs-6:v0.2.0

Wait-for-it

Changelog:

• Predefined services are disabled by default
• Multiple patches to /sbin/my_init and /sbin/setuser
• New wait phase in container lifecycle
• New enable_service script
• Lot of things explained in documentation
• More strict tests (still searching for more bulletproof solution)

Artifacts:

• docker pull dalee/baseimage:v0.1.0
• docker pull dalee/php-5.6:v0.1.0
• docker pull dalee/nodejs-6:v0.1.0

Tagged releases

Artifacts

• docker pull dalee/baseimage:v0.0.2
• docker pull dalee/php-5.6:v0.0.2
• docker pull dalee/nodejs-6:v0.0.2

Initial open source release

Initial release, not published to Docker Hub.